Land Rover & Range Rover Fault Code Index
OBD-II / EOBD Reference - 125 Codes - All Key Models - Last reviewed: April 2026
This index covers 125 OBD-II and EOBD fault codes commonly reported on Land Rover and Range Rover vehicles. Each entry includes the affected models, the most likely failure component, and a workshop note based on real-world diagnostic patterns. Use the model and system filters below to find codes relevant to your vehicle.
Key Takeaways
- 125 fault codes across 12 system categories, covering Defender, Discovery 3/4, Freelander 2, Range Rover, and Range Rover Sport.
- EU-market diesel focus - 2.7 TDV6 (276DT), 3.0 TDV6/SDV6 (306DT), 2.2 TDCI, TD5, TDV8, and SD4 platforms prioritised.
- Each code includes a likely failure component and a workshop insight note where applicable.
- Filter by model using the buttons below, or browse by system using the section navigation.
- Codes marked ★ are high-frequency, high-value fault codes with the highest search demand.
- Always confirm with a live diagnostic scan before ordering parts. Code presence indicates a likely fault area, not a confirmed component failure.
From Code to Component: Identifying the Right Parts
A fault code is a compass, not a final destination. At Budget Parts, we provide this index to help Land Rover owners move from a confusing warning light to the most likely fault area and the components most commonly responsible. Final part selection must follow platform-specific diagnostic confirmation - see the disclaimer below.
Decoding the Data: Why Identification Matters
Buying parts based on a dashboard light alone can lead to expensive misdiagnosis. A single code can represent multiple components. For example, a fuel pressure fault could be the pump, the filter, or a regulator.
- Workshop Insight: We include specific notes in this index to highlight the most common component failures seen in real-world workshop conditions.
- First-Time Fix: Our goal is to ensure that when you order from our warehouse, you are receiving the part that actually solves the problem.
Professional Diagnostics + Specialist Supply
To get the most value from our parts catalog, we recommend using specialist tools like SDD or Pathfinder. These systems provide the deep-level data required to distinguish between a failed sensor and a mechanical component failure.
Preventing "Parts Cannon" Repairs
The most expensive part is the one you didn't need to buy. This index helps you identify Model-Specific Quirks - like the intercooler hose splits common on the TDV6 - so you can order a simple hose rather than an expensive turbocharger.
This guide focuses on EU diesel platforms including Discovery 3/4 (276DT, 306DT), Freelander 2 (2.2 TDCI), and Range Rover L322/L405 models commonly seen across the Netherlands and wider Europe.
Browse by Model
Browse by System
No fault codes match this model filter in this section.
Fuel System
| Code | Description | Severity | Affected Models | Model Tags | Likely Fault Component |
|---|---|---|---|---|---|
| P0087★ | Fuel rail/system pressure too low
Workshop NoteOn 306DT engines, confirm the HPFP drive belt (rear) is intact. While P0087 often points to a worn pump or restricted filter, a snapped rear belt will cause an immediate non-start. Check the 306DT HPFP drive belt at the timing belt service interval (refer to JLR service schedule for the specific vehicle, not to exceed approximately 120,000 miles / 193,000 km - however, the 306DT interval was subject to JLR TSB revision and is build-date dependent. Always confirm the applicable service schedule for the specific vehicle; do not rely solely on the mileage figure above. The belt is not separately serviceable on a different cycle - it is addressed as part of the timing belt job.
|
Critical | Discovery 3 (L319), Discovery 4 (L319), Range Rover Sport (L320), Defender 110/130 (2.4 TDCi) | HPFP, fuel filter, fuel pressure regulator; 306DT: HPFP drive belt (rear of engine) | |
| P0088 | Fuel rail/system pressure too high
Workshop NoteIf the regulator fails open, pressure overshoots. Confirm with live rail pressure data before part replacement.
|
Critical | Discovery 3 (L319 276DT), Discovery 4 (L319 306DT), Range Rover (L322 TDV8), Range Rover Sport (L320) | Fuel pressure regulator, pressure relief valve | |
| P0093 | Fuel system large leak detected
Workshop NoteInspect HP pipes and injector return rail for wet fuel before smoke testing. Physical inspection is faster on this code. If no external leak is found, perform an injector back-leak test. Internal injector command valve failure is a frequent cause of P0093 on JLR common-rail platforms and will leave no visible external fuel trace.
|
Critical | Discovery 3 (L319), Range Rover Sport (L320), Freelander 2 (L359) | Fuel injector return line, HP fuel pipe | |
| P0094 | Fuel system small leak detected
Workshop NoteOften a weeping banjo bolt or cracked low-pressure pipe. Check connections at filter housing first.
|
Warning | Discovery 3 (L319), Discovery 4 (L319), Range Rover Sport (L320/L494) | Fuel return banjo, low-pressure fuel pipe | |
| P0190 | Fuel rail pressure sensor circuit
Workshop NoteCircuit fault; check wiring continuity and sensor connector before replacing sensor.
|
Warning | Discovery 3 (L319), Discovery 4 (L319), Freelander 2 (L359 2.2 TDCI) | Fuel rail pressure sensor | |
| P0191 | Fuel rail pressure sensor range/performance
Workshop NoteIntermittent signal; flex test wiring harness under live conditions before replacing sensor.
|
Warning | Discovery 3 (L319 276DT), Discovery 4 (L319 306DT), Freelander 2 (L359 2.2 TDCI) | Fuel rail pressure sensor, wiring | |
| P0192 | Fuel rail pressure sensor circuit low
Workshop NoteLow voltage signal; check 5V reference supply from ECU before condemning sensor.
|
Warning | All Land Rover common-rail diesel models (TDV6, SDV6, TDV8, TDCI) | Fuel rail pressure sensor | |
| P0193 | Fuel rail pressure sensor circuit high
Workshop NoteHigh voltage signal; open circuit in sensor wiring is the common cause.
|
Warning | All Land Rover common-rail diesel models (TDV6, SDV6, TDV8, TDCI) | Fuel rail pressure sensor | |
| P0090 | Fuel pressure regulator control circuit
Workshop NoteCheck wiring loom routing near hot components; chafing common on Defender.
|
Warning | Discovery 4 (L319 306DT), Range Rover Sport (L320), Defender 2.4 TDCi | Fuel pressure regulator, wiring loom | |
| P0091 | Fuel pressure regulator circuit low
Workshop NoteLow-side circuit fault; confirm regulator resistance before ordering.
|
Warning | Discovery 3 (L319 276DT), Range Rover (L322 TDV8) | Fuel pressure regulator | |
| P0001 | Fuel volume regulator open circuit
Workshop NoteFirst, inspect the VCV connector pins for backing out and test wiring continuity - on many 276DT/306DT vehicles a connector repair resolves P0001 without pump removal. Also check for harness chafing at the back of the 'V'. On most variants the VCV can be replaced individually without replacing the complete HPFP.
|
Warning | Discovery 3 (L319 276DT), Range Rover (L322 TDV6) | Fuel volume control valve (on HPFP) | |
| P0002 | Fuel volume regulator range/performance
Workshop NotePerformance fault; confirm with fuel trim and rail pressure data under load before replacing.
|
Warning | Discovery 3 (L319 276DT), Discovery 4 (L319 306DT), Range Rover (L322 3.0 TDV6) | Fuel volume control valve | |
| P0251 | Injection pump fuel metering control A
Workshop NoteP0251 is a standard OBD-II code (SAE J2012) - not Ford-proprietary. Applicability to 276DT common-rail platforms should be verified via live SDD data, as this code is more commonly associated with rotary injection pump architectures. Confirm with platform-specific freeze-frame data before acting on it.
|
Warning | Defender TD5, Discovery 3 early (L319 276DT) | TD5: Injection pump metering valve; 276DT: Verify via SDD before assigning component | |
| P0200 | Injector circuit malfunction
Workshop NoteGeneric injector circuit flag; run cylinder-specific codes to identify which injector before replacing.
|
Critical | All Land Rover diesel models | Fuel injector, injector wiring | |
| P0201 | Injector circuit cylinder 1
Workshop NoteConfirm injector resistance and return volume test before replacement. TD5 Note: Uses unit injectors; perform a contribution/balance test via SDD and inspect the injector loom for oil contamination rather than a return volume test. Common-rail note (276DT / 306DT / SD4 / eD4): After any injector replacement, IQA (Injector Quantity Adjustment) coding via SDD is mandatory. Failure to code the replacement injector will result in incorrect fuel delivery and continued fault conditions
|
Critical | Defender TD5, Discovery 3 (L319 276DT), Freelander 2 (L359 2.2 TDCI) | Cylinder 1 injector | |
| P0202 | Injector circuit cylinder 2
Workshop NoteReturn volume test cylinders together to identify the outlier. TD5 Note: Perform a cylinder contribution test via SDD and check for oil in the injector harness connector at the rocker cover. The root cause of recurring oil ingress is the injector harness grommet/seal at the rocker cover - replace this seal when addressing contaminated connectors, or the fault will return. Common-rail note (276DT / 306DT / SD4 / eD4): After any injector replacement, IQA (Injector Quantity Adjustment) coding via SDD is mandatory. Failure to code the replacement injector will result in incorrect fuel delivery and continued fault conditions
|
Critical | Defender TD5, Discovery 3 (L319 276DT), Freelander 2 (L359 2.2 TDCI) | Cylinder 2 injector | |
| P0203 | Injector circuit cylinder 3
Workshop NoteReturn volume test; confirm before ordering to avoid unnecessary replacement. TD5 Note: Inspect the injector harness for oil ingress, which commonly causes misfire codes on this cylinder. The root cause is the injector harness grommet at the rocker cover - replace this seal to prevent recurrence. Common-rail note (276DT / 306DT / SD4 / eD4): After any injector replacement, IQA (Injector Quantity Adjustment) coding via SDD is mandatory. Failure to code the replacement injector will result in incorrect fuel delivery and continued fault conditions
|
Critical | Defender TD5, Discovery 3 (L319 276DT), Freelander 2 (L359 2.2 TDCI) | Cylinder 3 injector | |
| P0204 | Injector circuit cylinder 4
Workshop NoteOn 6-cylinder engines confirm it is not a wiring fault before removing injector. Common-rail note (276DT / 306DT / SD4 / eD4): After any injector replacement, IQA (Injector Quantity Adjustment) coding via SDD is mandatory. Failure to code the replacement injector will result in incorrect fuel delivery and continued fault conditions
|
Critical | All inline 4-cylinder and 6-cylinder diesel Land Rover models | Cylinder 4 injector | |
| P1211 | Manufacturer-specific code - definition varies by platform
Workshop NoteP1211 is a manufacturer-specific (non-SAE) code. On the Defender TDCi it is a JLR/Ford-defined code specific to that platform - its meaning must be retrieved from SDD or IDS against the vehicle VIN. It does not share its definition with any SAE J2012 standard code. Diagnose using live SDD data only; do not apply generic fault descriptions from other platforms or engine families to this code.
|
Warning | Defender TDCi | Confirm via SDD/IDS - platform-specific diagnosis required |
Turbocharger & Air Intake
| Code | Description | Severity | Affected Models | Model Tags | Likely Fault Component |
|---|---|---|---|---|---|
| P0299 ★ | Turbocharger underboost condition
Workshop Note276DT (2.7 TDV6): Charge-air hose integrity is the first-line check. Inspect upper and lower intercooler hoses and all boost pipe clips under light pressure before further diagnosis. 306DT / SDV6 (3.0): Also confirm secondary turbo isolation valve (CSOV) operation and its vacuum solenoid before assuming a boost leak - CSOV failure is equally or more common than a hose split on this platform. EGR faults may contribute to boost deviations on TDV6 but must be confirmed with live data; do not assume EGR as a cause from P0299 alone. On other turbo-diesel applications, confirm boost hose integrity, actuator control, vacuum supply, and sensor plausibility according to platform layout.
|
Critical | Discovery 3 (L319 276DT), Discovery 4 (L319 306DT), Range Rover Sport (L320), Defender 2.4 TDCi, Freelander 2 (L359 SD4) | Turbocharger, intercooler hose, boost actuator | |
| P0234 | Turbocharger overboost condition
Workshop NoteConfirm boost pressure live data before condemning actuator. The VNT actuator is a lower-cost first test before replacing the complete turbocharger assembly. Note: most modern ECUs will enter boost-limiting limp mode before turbocharger mechanical damage occurs. Stop-immediately action is only warranted if the overboost condition is severe and sustained without ECU intervention.
|
WARNING | Discovery 3 (L319 276DT), Discovery 4 (L319 306DT), Range Rover (L322 TDV8), Freelander 2 (L359 2.2 TDCI) | Boost solenoid, turbo actuator | |
| P0235 | Turbo boost sensor A circuit
Workshop NoteCircuit fault; check wiring first. MAP sensor connector is a common failure point on high-mileage engines.
|
Warning | All Land Rover turbocharged diesel models | MAP/boost pressure sensor | |
| P0236 | Turbo boost sensor A range/performance
Workshop NotePerformance fault; cross-check boost reading against expected values under load.
|
Warning | Discovery 3 (L319 276DT), Discovery 4 (L319 306DT), Defender TDCi | MAP/boost pressure sensor | |
| P0238 | Turbo boost sensor A circuit high
Workshop NoteHigh voltage; check for chafed wiring or water ingress at sensor connector.
|
Warning | All TDV6 models (276DT/306DT) | MAP/boost pressure sensor, wiring | |
| P0045 | Turbo boost control solenoid A open
Workshop NoteOpen circuit; test solenoid resistance and operation with 12V bench test before fitting replacement.
|
Warning | Discovery 3 (L319 276DT), Discovery 4 (L319 306DT), Range Rover Sport (L320) | Boost pressure control solenoid | |
| P2263★ | Turbo/supercharger system performance
Workshop NoteOn 3.0 SDV6: check secondary turbo isolation valve sticky linkage and vacuum actuator before any turbo replacement. This is the most common cause on that platform.
|
Warning | Discovery 4 (L319 306DT), Range Rover Sport (L320/L494), Freelander 2 (L359 SD4), Range Rover (L405 SDV6) | Secondary turbo isolation valve (SDV6); VNT vanes, boost pipes (TDV6) | |
| P2563 | Turbocharger actuator position sensor
Workshop NotePosition sensor is integrated with the actuator on most fitments; confirm sensor signal before replacing actuator.
|
Warning | Discovery 4 (L319 306DT), Range Rover Sport (L494), Freelander 2 (L359 SD4) | VNT actuator, turbo position sensor | |
| P003A | Turbocharger B position sensor range
Workshop NoteTwin-turbo platform only. Confirm which turbo is flagging before diagnosis.
|
Warning | Range Rover L405 3.0 SDV6 (306DT) twin-sequential turbo, Discovery 4 (L319 SDV6) | Secondary turbo actuator sensor | |
| P0101 | MAF sensor range/performance
Workshop NoteCheck air filter condition and intake ducting for splits before replacing MAF. A dirty filter alone can trigger this code.
|
Warning | All Land Rover diesel and petrol models | Mass airflow sensor, air filter, intake ducting | |
| P0100 | MAF sensor circuit malfunction
Workshop NoteCircuit fault; check sensor connector and wiring before ordering sensor.
|
Warning | All Land Rover models | MAF sensor, wiring | |
| P00BD | MAF airflow range/performance bank 1
Workshop NoteCheck for unmetered air between MAF and throttle body before replacing sensor.
|
Warning | Discovery 4 (L319 306DT), Range Rover Sport (L494), Range Rover (L405) | MAF sensor, intake air leak | |
| P0102 | MAF sensor circuit low
Workshop NoteLow-signal fault; check 5V reference and earth continuity at sensor.
|
Warning | All Land Rover models | MAF sensor, wiring | |
| P0103 | MAF sensor circuit high
Workshop NoteHigh-signal fault; often caused by open circuit in signal wire.
|
Warning | All Land Rover models | MAF sensor, wiring |
Air Suspension
| Code | Description | Severity | Affected Models | Model Tags | Likely Fault Component |
|---|---|---|---|---|---|
| C1A00★ | Air suspension compressor performance fault
Workshop NoteConfirm your original compressor supplier before ordering. L322, L319, and L320: Conversion from Hitachi to AMK requires a full hardware kit, relay, and a specific SDD configuration write (not just an update) to set the correct duty cycle. Failure to perform this will cause rapid overheating and unit failure. Range Rover L405: This model uses a Wabco compressor as standard; the Hitachi/AMK conversion procedure and software warnings do not apply to this platform.
|
Critical | Range Rover (L322), Range Rover (L405), Range Rover Sport (L320/L494), Discovery 3 (L319), Discovery 4 (L319) | Air compressor, relay, dryer | |
| C1A01 | Air suspension compressor circuit fault
Workshop NoteCheck relay and supply fuse before condemning compressor. Relay failure is common and inexpensive.
|
Critical | Range Rover Sport (L320), Discovery 3 (L319), Discovery 4 (L319) | Compressor, wiring, relay | |
| C1A07 | Height sensor fault front left
Workshop NoteInspect linkage arm for corrosion and seized pivot before replacing sensor. Linkage failure is as common as sensor failure. After replacing the height sensor, a suspension calibration procedure via SDD is required. Failure to calibrate will result in incorrect ride height targets and persistent fault codes.
|
Warning | All Land Rover air suspension models | Front left height sensor, sensor linkage arm | |
| C1A08 | Height sensor fault front right
Workshop NoteSame inspection procedure as C1A07; check both sides together. After replacing the height sensor, a suspension calibration procedure via SDD is required. Failure to calibrate will result in incorrect ride height targets and persistent fault codes.
|
Warning | All Land Rover air suspension models | Front right height sensor, sensor linkage arm | |
| C1A09 | Height sensor fault rear left
Workshop NoteRear linkage arms are more exposed to road debris; check for physical damage first. After replacing the height sensor, a suspension calibration procedure via SDD is required. Failure to calibrate will result in incorrect ride height targets and persistent fault codes.
|
Warning | All Land Rover air suspension models | Rear left height sensor, sensor linkage arm | |
| C1A0A | Height sensor fault rear right
Workshop NoteCheck both rear sensors together; replace as a pair if one has failed due to age. After replacing the height sensor, a suspension calibration procedure via SDD is required. Failure to calibrate will result in incorrect ride height targets and persistent fault codes.
|
Warning | All Land Rover air suspension models | Rear right height sensor, sensor linkage arm | |
| C1A15 ★ | Air suspension valve block fault
Workshop NoteJLR does not publish individual solenoid replacement procedures - full valve block replacement is the standard dealer repair. However, specialist solenoid rebuild kits are available from independent suppliers and are used by experienced independent workshops to repair the unit at a lower cost. Inspect the internal plungers for "stiction" or debris from a failing air dryer before deciding between a rebuild or a complete new assembly. After replacing the valve block, perform a suspension calibration via SDD. Fitting a replacement without calibrating will result in incorrect ride height and persistent fault codes.
|
Critical | Range Rover (L322), Discovery 3 (L319), Discovery 4 (L319), Range Rover Sport (L320) | Valve block assembly (front, center, or rear) | |
| C1A13 | Reservoir pressure static not building
Workshop NoteCheck one-way valve between compressor and reservoir before condemning compressor. A failed check valve prevents reservoir from holding pressure.
|
Critical | Range Rover (L322), Range Rover (L405), Discovery 4 (L319) | Reservoir tank, check valve, compressor | |
| C1A20 | Pressure increases too slowly
Workshop NoteC1A20 indicates the air suspension system is taking too long to build pressure. Diagnose the compressor output, exhaust valve, dryer, and reservoir check valve before moving to corner-level leak diagnosis. Only investigate air springs and pipe unions if supply-side hardware is confirmed serviceable.
|
Warning | Range Rover (L405), Range Rover Sport (L494), Discovery 4 (L319) | Compressor output, exhaust valve, air dryer, reservoir check valve; air springs/unions if supply-side confirmed serviceable | |
| C1A36 | Pressure sensor fault
Workshop NoteSensor is integrated into the valve block on L405/L494. Confirm sensor fault with live data before replacing the valve block assembly.
|
Warning | Range Rover (L405), Range Rover Sport (L494) | Pressure sensor (within valve block assembly) | |
| C1A44 | Corner fill time excessive rear left
Workshop NoteSlow corner fill; physically inspect rear left air spring for cracking or bladder delamination. Cold-weather failures are common.
|
Warning | Range Rover (L405), Discovery 4 (L319) | Rear left air spring, pipe leaks | |
| C1A45 | Corner fill time excessive rear right
Workshop NoteInspect rear right spring in tandem with rear left; replace in pairs where possible.
|
Warning | Range Rover (L405), Discovery 4 (L319) | Rear right air spring, pipe leaks | |
| C1A46 | Corner fill time excessive front left
Workshop NoteFront springs are under higher load cycles; inspect for bladder cracking at the fold line.
|
Warning | Range Rover (L405), Range Rover Sport (L494) | Front left air spring, corner valve | |
| C1A47 | Corner fill time excessive front right
Workshop NoteInspect front right spring alongside front left. Front spring pairs should be replaced together.
|
Warning | Range Rover (L405), Range Rover Sport (L494) | Front right air spring, corner valve |
Engine / Sensors / Timing
| Code | Description | Severity | Affected Models | Model Tags | Likely Fault Component |
|---|---|---|---|---|---|
| P0300★ | Random/multiple cylinder misfire
Workshop NoteRun P0087 diagnosis in parallel. Low fuel rail pressure is a frequent root cause of multi-cylinder misfire on these platforms.
|
Critical | Discovery 3 (L319 276DT), Discovery 4 (L319 306DT), Range Rover (L322 TDV8 3.6/4.4) | Injectors, glow plugs; cross-check fuel rail pressure | |
| P0301 | Cylinder 1 misfire
Workshop NoteCylinder-specific; run return volume test and glow plug resistance check before removal.
|
Critical | All Land Rover models | Injector, glow plug, compression | |
| P0302 | Cylinder 2 misfire
Workshop NoteReturn volume test to isolate.
|
Critical | All Land Rover models | Injector, glow plug | |
| P0303 | Cylinder 3 misfire
Workshop NoteReturn volume test to isolate.
|
Critical | All Land Rover models | Injector, glow plug | |
| P0304 | Cylinder 4 misfire
Workshop NoteOn 6-cylinder engines confirm cylinder numbering convention before diagnosis.
|
Critical | All inline Land Rover engines | Injector, glow plug | |
| P0335 | Crankshaft position sensor A circuit
Workshop NoteNo crank signal means no start. Confirm sensor air gap and reluctor ring condition before replacing sensor.
|
Critical | All Land Rover models | Crankshaft position sensor | |
| P0336 | Crankshaft position sensor A range
Workshop NoteIntermittent signal; check reluctor ring for missing or damaged teeth before replacing sensor.
|
Warning | Discovery 3 (L319 276DT), Discovery 4 (L319 306DT), Freelander 2 (L359 2.2 TDCI) | Crankshaft position sensor, reluctor ring | |
| P0340 | Camshaft position sensor A circuit
Workshop NoteCircuit fault; check connector and wiring. CMP sensor failure on TD5 can cause no-start.
|
Warning | Defender TD5, Discovery 3 (L319 276DT), Freelander 2 (L359 2.2) | Camshaft position sensor | |
| P0341 | Camshaft position sensor A range
Workshop NoteConfirm signal pattern on oscilloscope if intermittent; tone ring damage is a secondary cause.
|
Warning | Discovery 3 (L319 276DT), Discovery 4 (L319 306DT) | Camshaft sensor, tone ring | |
| P0380 ★ | Glow plug circuit A malfunction
Workshop NoteCold resistance varies significantly by plug type (standard, ceramic, steel-sheath) and platform - do not apply a single threshold across all engines. Cross-reference the resistance specification for the exact plug type fitted; a value within spec does not guarantee function. Note that a plug can pass a resistance test but fail to reach temperature due to a broken internal element. A current draw test is the JLR-recommended definitive functional test - refer to the platform-specific specification for the expected current draw at initial energisation.
|
Warning | All Land Rover diesel models | Glow plug relay, glow plugs | |
| P0381 | Glow plug indicator circuit
Workshop NoteIndicator circuit only; engine may start and run normally. Confirm control module before replacing.
|
Minor | Defender TD5, Discovery 3 (L319 276DT), Discovery 4 (L319 306DT) | Glow plug control module | |
| P0606 | ECM/PCM processor fault
Workshop NoteConfirm supply voltage and earth quality to ECU before condemning. Low voltage and poor earths commonly trigger this code.
|
Critical | All Land Rover models | ECU/ECM unit | |
| P0611 | Fuel injector control module performance
Workshop NoteInjector drive fault within the engine management system. The injector driver stage may be ECM-integrated or a separate Injector Driver Module (IDM) depending on variant. Confirm module architecture via SDD before any replacement.
|
Critical | Discovery 3 (L319 276DT), Discovery 4 (L319 306DT), Range Rover (L322 TDV6) | Injector driver stage (ECM-integrated or separate IDM — confirm via SDD) | |
| P0642 | Sensor reference voltage A circuit low
Workshop NoteA failing 5V reference can trigger multiple simultaneous sensor codes. Identify all codes first; if multiple sensors flag together, trace the common reference circuit.
|
Warning | All Land Rover models | ECU, sensor wiring, 5V reference circuit | |
| P0650 | MIL engine management lamp circuit
Workshop NoteCircuit fault only; does not indicate engine condition. Confirm bulb and BCM wiring before further diagnosis.
|
Minor | All Land Rover models | MIL bulb, BCM, wiring |
Electrical & Charging
| Code | Description | Severity | Affected Models | Model Tags | Likely Fault Component |
|---|---|---|---|---|---|
| P0560 | System voltage malfunction
Workshop NoteCheck main earth strap condition at battery and bodywork before testing alternator. Poor earth is the most common cause.
|
Warning | All Land Rover models | Battery, alternator, main earth strap | |
| P0562 | System voltage low
Workshop NoteTest battery under load before testing alternator. A weak battery will trigger this code even with a healthy alternator.
|
Warning | All Land Rover models | Battery, alternator | |
| P0563 | System voltage high
Workshop NoteOvervoltage condition; confirm alternator output before condemning regulator.
|
Warning | All Land Rover models | Voltage regulator, alternator | |
| P0620 | Generator control circuit malfunction
Workshop NoteCheck alternator excitation wire condition; common chafing point near exhaust on Defender.
|
Warning | Discovery 3 (L319 276DT), Defender TD5, Defender TDCi | Alternator, charge control wiring | |
| P0625 | Generator field terminal circuit low
Workshop NoteLow-side circuit; confirm field winding resistance before replacing alternator.
|
Warning | All Land Rover models | Alternator field winding, wiring | |
| B1A18★ | Battery monitoring sensor circuit fault
Workshop NoteIBS is clipped to the negative battery terminal. Common fault on L405 platform. Confirm with live IBS data before replacing battery.
|
Warning | Range Rover (L405), Discovery 4 (L319), Discovery 5 (L462), Range Rover Sport (L494) | IBS (intelligent battery sensor) on negative terminal |
CAN Bus & Network
| Code | Description | Severity | Affected Models | Model Tags | Likely Fault Component |
|---|---|---|---|---|---|
| U0001★ | High speed CAN bus communication fault
Workshop NoteOften triggered by low system voltage rather than physical CAN failure. Check battery and P0562/B1A18 first. If voltage is good, run full system scan to identify which module is dropping off the bus.
|
Critical | All Land Rover models | CAN bus wiring, module, battery voltage | |
| U0100 | Lost communication with ECM/PCM
Workshop NoteCheck ECM supply voltage and earth before CAN wiring diagnosis.
|
Critical | All Land Rover models | ECM, CAN wiring | |
| U0101 | Lost communication with TCM
Workshop NoteConfirm TCM supply fuse and earth first. TCM location varies by model.
|
Critical | All Land Rover automatic models | TCM, CAN bus wiring | |
| U0121 | Lost communication with ABS module
Workshop NoteCheck ABS module fuse and supply before CAN wiring diagnosis.
|
Critical | All Land Rover models | ABS module, CAN wiring | |
| U0140 | Lost communication with body control module
Workshop NoteBCM controls numerous comfort and lighting functions; loss of comms often causes multiple simultaneous warning lights.
|
Warning | All Land Rover models | BCM, wiring | |
| U0155 | Lost communication with instrument cluster
Workshop NoteInstrument cluster on L322 is a known failure point; confirm CAN continuity before replacing cluster.
|
Warning | Discovery 3 (L319), Discovery 4 (L319), Range Rover (L322) | Instrument pack, CAN wiring | |
| U0401 | Invalid data received from ECM/PCM
Workshop NoteInvalid data code; ECM is on the bus but sending corrupt data. Check ECM supply voltage and software version.
|
Warning | Discovery 4 (L319 306DT), Range Rover Sport (L494) | ECM, CAN node fault | |
| U0416 | Invalid data from vehicle dynamics module
Workshop NoteConfirm module is not water damaged before condemning. L405 and L494 VDC modules are located in areas prone to water ingress.
|
Warning | Discovery 4 (L319 306DT), Range Rover (L405), Range Rover Sport (L494) | VDC module, CAN wiring | |
| U3000 | Control module internal fault
Workshop NoteGeneric code; always identify which module via full system scan. Supply voltage fault is the most common trigger before module condemnation.
|
Critical | Discovery 3 (L319), Discovery 4 (L319), Range Rover (L322/L405) | Relevant control module, supply voltage | |
| U0126 | Lost communication steering angle sensor
Workshop NoteSAS must be calibrated after any steering or suspension work. Lost comms can follow recalibration failure.
|
Warning | Discovery 3 (L319), Discovery 4 (L319), Range Rover Sport (L320) | SAS module, CAN wiring |
Brakes & ABS
| Code | Description | Severity | Affected Models | Model Tags | Likely Fault Component |
|---|---|---|---|---|---|
| C0031 | Left front wheel speed sensor circuit
Workshop NoteInspect sensor wiring loom for chafing at the wheel arch before replacing sensor. ABS ring corrosion is common on vehicles over 8 years old.
|
Critical | All Land Rover models | Wheel speed sensor, tone ring, wiring | |
| C0034 | Right front wheel speed sensor circuit
Workshop NoteSame inspection procedure as C0031; check both front sensors at the same time.
|
Critical | All Land Rover models | Wheel speed sensor, wiring | |
| C0037 | Left rear wheel speed sensor circuit
Workshop NoteRear wheel speed sensors are more exposed to mud and water; clean before testing.
|
Critical | All Land Rover models | Wheel speed sensor, tone ring | |
| C0040 | Right rear wheel speed sensor circuit
Workshop NoteReplace in pairs if both rears are original and high mileage.
|
Critical | All Land Rover models | Wheel speed sensor, wiring | |
| C0110 | ABS pump motor circuit malfunction
Workshop NoteConfirm motor supply fuse and relay before condemning pump. Motor unit can be replaced separately on some fitments.
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Critical | Discovery 3 (L319), Discovery 4 (L319), Range Rover Sport (L320) | ABS pump/motor unit | |
| C0265 | ABS/EBCM relay voltage malfunction
Workshop NoteCheck relay and fuse first; relay failure is inexpensive and a common cause on high-mileage vehicles.
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Critical | All Land Rover models | ABS relay, wiring, ABS module | |
| C1095 | ABS hydraulic pump motor circuit
Workshop NotePump assembly is a known failure on L322 and early L319. Rebuilt units are available as a cost alternative.
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Critical | Range Rover (L322), Discovery 3 (L319) | ABS pump assembly | |
| C0045 | Left rear ABS solenoid circuit
Workshop NoteSolenoid is integral to ABS modulator on most fitments. Confirm fault is not wiring before condemning modulator.
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Warning | All Land Rover models | ABS solenoid valve | |
| C0050 | Right rear ABS solenoid circuit
Workshop NoteSame as C0045; check both rear solenoid circuits together.
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Warning | All Land Rover models | ABS solenoid valve |
Electronic Parking Brake (EPB)
| Code | Description | Severity | Affected Models | Model Tags | Likely Fault Component |
|---|---|---|---|---|---|
| C1400(MoC) ★ | EPB actuator right circuit (Motor-on-Caliper)
Workshop NoteSpecific to L405/L494 motor-on-caliper systems. Check the short harness at the rear hub for cracking or salt corrosion. Service Note: Never press pistons back; use SDD 'Service Mode' to wind them back. Note: C1400 and C1401 are single fault codes. The diagnostic path differs depending on whether the vehicle uses the Motor-on-Caliper EPB system (L405/L494) or the cable-drum actuator system (L319/L320). Confirm EPB architecture before diagnosis.
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Critical | Range Rover (L405), Range Rover Sport (L494) | EPB Motor (on caliper), Hub Wiring Loom | |
| C1401(MoC) | EPB actuator left circuit (Motor-on-Caliper)
Workshop NoteCheck the left-hand hub connector for water ingress. Motors can be replaced individually without replacing the entire caliper.
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Critical | Range Rover (L405), Range Rover Sport (L494) | EPB Motor (on caliper), Hub Wiring Loom | |
| C1400(Cable) | EPB actuator right circuit (Cable-Drum)
Workshop NoteSpecific to the cable-actuated "black box" system. Usually indicates a failure within the central actuator unit or a snapped cable on the right side. Note: C1400 and C1401 are single fault codes. The diagnostic path differs depending on whether the vehicle uses the Motor-on-Caliper EPB system (L405/L494) or the cable-drum actuator system (L319/L320). Confirm EPB architecture before diagnosis.
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Critical | Discovery 4 (L319), Range Rover Sport (L320) | Central Actuator Box, EPB Cables | |
| C1401(Cable) | EPB actuator left circuit (Cable-Drum)
Workshop NoteCheck for a snapped or seized left-hand cable. If cables are intact, the internal gear in the central actuator box may have failed.
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Critical | Discovery 4 (L319), Range Rover Sport (L320) | Central Actuator Box, EPB Cables | |
| C1A43 ★ | EPB actuator performance (Screeching)
Workshop NoteSpecific to the cable-driven 'black box' actuator on Discovery 4 and RRS L320. Usually caused by unadjusted park brake shoes or seized expanders. If it 'screeches,' the internal plastic gears are stripping. Rebuild kits exist, but complete unit replacement is the reliable fix.
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Warning | Discovery 4 (L319), Range Rover Sport (L320) | EPB Actuator Unit, Brake Shoes | |
| C1405 | Auto-hold system fault
Workshop NoteThe auto-hold function requires valid data from the ABS and gear selector. Check for related U-series communication codes first.
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Warning | Range Rover (L405), Range Rover Sport (L494) | ABS Module data, CAN bus | |
| C1021 | EPB switch circuit fault
Workshop NotePhysical switch failure is common if liquids are spilled into the center console. Test switch resistance before replacing the expensive actuator unit.
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Warning | All Models with EPB | EPB Center Console Switch |
Emissions / EGR / DPF
| Code | Description | Severity | Affected Models | Model Tags | Likely Fault Component |
|---|---|---|---|---|---|
| P0400 | EGR flow malfunction
Workshop NoteGeneric EGR flow fault; inspect valve for carbon build-up before testing flow rate.
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Warning | Freelander 2 (L359 2.2 eD4/SD4), Discovery 3 (L319 276DT), Discovery 4 (L319 306DT) | EGR valve, EGR cooler | |
| P0401★ | EGR flow insufficient
Workshop NoteCarbon blockage of the EGR valve is a common cause on 2.2 TDCI and TDV6 platforms, but P0401 should be separated into valve flow fault, cooler restriction, and related feedback/sensor issues before replacement.
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Warning | Freelander 2 (L359 2.2 eD4/SD4), Discovery 3 (L319 276DT), Discovery 4 (L319 306DT), Range Rover Sport (L320) | EGR valve (carbon-blocked), EGR cooler | |
| P0402 | EGR flow excessive
Workshop NoteValve stuck open causes excess EGR at idle. Confirm with live EGR position data.
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Warning | Discovery 3 (L319 276DT), Range Rover Sport (L320) | EGR valve stuck open | |
| P0404 | EGR circuit range/performance
Workshop NotePosition sensor signal mismatch; check sensor and valve together before replacing either.
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Warning | Freelander 2 (L359 2.2 eD4/SD4), Discovery 4 (L319 306DT) | EGR valve, position sensor | |
| P0405 | EGR sensor A circuit low
Workshop NoteLow-side signal; check 5V reference and earth at sensor connector.
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Warning | All EU-market Land Rover diesel models | EGR position sensor | |
| P0406 | EGR sensor A circuit high
Workshop NoteOpen circuit in signal wire is the common cause.
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Warning | All EU-market Land Rover diesel models | EGR position sensor | |
| P2002★ | DPF efficiency below threshold bank 1
Workshop NoteCRITICAL: Failed DPF regeneration cycles cause fuel-into-sump oil dilution on JLR diesels. Always check oil level and condition. An oil service is required alongside any DPF repair on these platforms.
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Warning | All Euro 5 and Euro 6 Land Rover diesel models | DPF filter, lambda/NOx sensor | |
| P2003 | DPF efficiency below threshold bank 2
Workshop NoteP2003 (Bank 2 DPF efficiency) applies only to V-engine platforms with dual exhaust/DPF configurations. On the 3.6 TDV8 (368DT), there are two separate DPF elements (one per bank); if this code flags, bank-specific diagnostic tests are required to isolate the failure to the correct side.
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Warning | Range Rover (L322 TDV8 3.6/4.4), Range Rover Sport (L320 TDV8) | DPF filter; oil dilution risk applies here also | |
| P2453 | DPF differential pressure sensor circuit
Workshop NoteCheck sensor pipes for blockage or disconnection before replacing sensor. Blocked pipes are as common as sensor failure.
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Warning | Discovery 4 (L319 306DT), Range Rover (L405), Freelander 2 (L359 SD4) | DPF pressure sensor, sensor pipes | |
| P2454 | DPF pressure sensor circuit low
Workshop NoteLow-side signal; check sensor supply and wiring before replacing.
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Warning | All Euro 5 Land Rover diesel models | DPF pressure sensor | |
| P242F★ | DPF restriction ash accumulation
Workshop NoteAsh accumulation is end-of-life blockage that cannot be cleared by regeneration. Filter replacement required. Confirm oil is not fuel-diluted before fitting new filter.
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Warning | Discovery 4 (L319 306DT), Range Rover Sport (L320/L494), Defender 2.4/2.2 TDCi | DPF filter (ash-blocked); check oil condition for fuel dilution | |
| P2459 | DPF regeneration frequency too high
Workshop NoteFrequent regen requests indicate a partially blocked DPF or a fault in the regen trigger logic. Check post-injection fuel delivery.
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Warning | Freelander 2 (L359 SD4), Discovery 4 (L319 306DT) | DPF, fuel injector post-injection circuit |
Transmission & Gearbox
| Code | Description | Severity | Affected Models | Model Tags | Likely Fault Component |
|---|---|---|---|---|---|
| P0700 ★ | Transmission control system malfunction
Workshop NoteGeneric transmission flag. Always run a TCM sub-scan to identify specific solenoid or pressure codes. Platform Note: On ZF 6HP26 (L319/L320/L322), the TCM is a separate module. On ZF 8HP45/70 (L405/L494), the TCM is integrated into the Mechatronic Unit. Repair paths and part accessibility differ significantly between these generations; confirm your gearbox model before diagnosing internal solenoid faults. Important: ZF 8HP Mechatronic Units are vehicle-specific and require SDD configuration after fitment. A second-hand or uncoded unit will not function correctly.
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Warning | All Land Rover automatic models (ZF 6HP / ZF 8HP) | TCM (6HP), Mechatronic Unit (8HP), Solenoid Pack | |
| P0705 | Transmission range sensor circuit
Workshop NoteGear position sensor; failure can cause incorrect gear display and limp mode. Confirm with live selector data.
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Warning | ZF 6HP26 (L319/L320/L322), ZF 8HP45/70 (L405/L494) | Transmission Range Sensor (TRS) | |
| P0710 | Transmission fluid temp sensor circuit
Workshop NoteSensor is in the transmission pan on ZF units. Confirm ATF level and condition before sensor diagnosis.
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Warning | Discovery 3 (L319), Discovery 4 (L319), Range Rover Sport (L320) | Fluid temp sensor (in sump pan) | |
| P0715 | Input/turbine speed sensor circuit
Workshop NoteSpeed sensor inside transmission. Confirm fault with live speed data before internal access.
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Warning | All Land Rover ZF automatic models | Input speed sensor | |
| P0730 | Incorrect gear ratio
Workshop NoteCheck ATF level and condition first. Incorrect gear ratio is often caused by degraded fluid before mechanical wear.
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Warning | ZF 6HP26 auto, Discovery 4 (L319), Range Rover (L322) | Solenoid pack, clutch packs, ATF condition | |
| P0740 | Torque converter clutch circuit
Workshop NoteTCC solenoid is part of the valve body on ZF units. Confirm solenoid operation before condemning torque converter.
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Warning | All Land Rover ZF automatic models | TCC solenoid, torque converter | |
| P0750 | Shift solenoid A malfunction
Workshop NoteSolenoid A is accessible with valve body removal on ZF 6HP. ZF 6HP solenoids are press-fit into the valve body; correct extraction and installation tooling is required to avoid bore damage. Confirm fault with solenoid resistance test.
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Warning | Discovery 3 (L319), Discovery 4 (L319), Range Rover Sport (L320) | Shift solenoid A | |
| P0796 | Pressure control solenoid C performance
Workshop NoteSolenoid is in the valve body. ATF quality has a direct effect on solenoid performance; confirm fluid condition first.
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Warning | ZF 6HP (Range Rover L322) | Pressure control solenoid C |
Cooling System
| Code | Description | Severity | Affected Models | Model Tags | Likely Fault Component |
|---|---|---|---|---|---|
| P0115 | Engine coolant temp sensor circuit
Workshop NoteCheck connector condition before replacing sensor; corrosion at ECT connector is common on older models.
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Warning | All Land Rover models | Coolant temp sensor (ECT) | |
| P0116 | Coolant temp sensor range/performance
Workshop NotePerformance fault; confirm slow warm-up symptom which also indicates thermostat failure.
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Warning | Discovery 3 (L319 276DT), Discovery 4 (L319 306DT), Defender TD5, Freelander 2 (L359 2.2 TDCI) | Coolant temp sensor | |
| P0117 | Coolant temp sensor circuit low
Workshop NoteLow-side signal; check 5V reference supply at sensor.
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Warning | All Land Rover diesel models | Coolant temp sensor, wiring | |
| P0118 | Coolant temp sensor circuit high
Workshop NoteHigh-side signal; open circuit in sensor wiring or failed sensor.
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Warning | All Land Rover models | Coolant temp sensor, wiring | |
| P0128 ★ | Coolant thermostat below regulating temp
Workshop NoteThermostat failure is a frequently reported fault on Freelander 2 2.2 platforms, often caused by the housing cracking or warping. Replace the thermostat and housing as a complete assembly. Software Note: On 2.2 platforms, if P0128 persists after a mechanical repair, you must perform a coolant temperature sensor adaptation/re-learn procedure via SDD to reset the ECU's expected thermal parameters.
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Warning | Freelander 2 (L359 2.2 eD4/SD4), Discovery 3 (L319 276DT), Discovery 4 (L319 306DT), Defender TDCi | Thermostat assembly, SDD Adaptation | |
| P0217 | Engine coolant overtemperature condition
Workshop NoteStop driving immediately. Check coolant level, fan operation, and thermostat before further diagnosis.
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Critical | All Land Rover models | Cooling fan, thermostat, water pump | |
| P1285 | Engine overtemperature condition
Workshop NoteStop driving immediately. TDV6/SDV6 (276DT/306DT): Inspect the EGR cooler for internal failure, which can cause significant coolant loss without an external leak. Defender TD5 & Range Rover V8: Focus on the thermostat, water pump, and radiator fan operation, as these models do not share the TDV6's EGR cooler failure path.
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Critical | Discovery 3/4 (276DT/306DT), Range Rover (L322 V8), Defender TD5 | Thermostat, water pump, EGR cooler (TDV6 only) |
Tyre Pressure Monitoring (TPMS)
| Code | Description | Severity | Affected Models | Model Tags | Likely Fault Component |
|---|---|---|---|---|---|
| C0775 ★ | Low tyre pressure sensor system
Workshop NoteStandard on all post-2014 EU models. Usually triggered after a tyre change where a sensor has been physically damaged or the battery has reached its 5-7 year end-of-life. Verify which wheel is flagging via live data before breaking the bead.
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Warning | All Land Rover models (Post-2014 EU Fitment) | TPMS Sensor, Valve Stem | |
| C077A | System unlocated sensor
Workshop NoteThe system cannot identify which corner a sensor belongs to. Platform Note: TPMS sensor registration on L405/L494 requires either SDD-initiated sensor ID programming or a TPMS activation tool. Check platform-specific procedure before attempting drive-cycle re-learn, as driving alone will not register new sensor IDs on these models.
|
Minor | Range Rover (L405), RRS (L494), Discovery 5 (L462) | Sensor Calibration / Re-learn | |
| C0778 | Tyre pressure monitoring module fault
Workshop NoteInternal module fault. On older L319/L322 models, check for water ingress in the rear quarters where the TPMS receiver module is often located.
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Warning | Discovery 3/4 (L319), RRS (L320), Range Rover (L322) | TPMS Control Module, Receiver | |
| B1D64 | TPMS initiator circuit
Workshop NoteSpecific to models with LF (Low Frequency) initiators in the wheel arches. Check wiring to the wheel arch initiator coils for debris damage. Build Note: L405 production variants (pre- and post-2016 facelift) utilize different TPMS module and initiator suppliers with distinct wiring layouts. Always confirm the vehicle build date before ordering replacement initiator components to ensure hardware compatibility.
|
Warning | Range Rover (L405), Range Rover Sport (L494) | LF Initiator, Wiring Loom |
Frequently Asked Questions
What causes P2002 on a Land Rover or Range Rover?
P2002 means the diesel particulate filter is no longer trapping soot efficiently. The most common cause on JLR diesel platforms is a DPF blocked by repeated failed regeneration cycles, typically from short journeys that prevent the exhaust reaching regeneration temperature. Before replacing the DPF, check the oil dipstick for a rising oil level, which is the clearest symptom of fuel draining into the sump during failed regenerations. A new filter fitted over contaminated oil will fail again quickly.
What causes P00Q6 on a Land Rover Discovery 4?
P00Q6 indicates a fault with the secondary turbocharger control valve on the Discovery 4 with the 3.0 SDV6 306DT engine. This engine uses a two-stage turbo system where a solenoid-operated valve controls when the secondary turbo comes online. The valve itself sticks or fails due to carbon build-up or vacuum line deterioration, and this is the first component to inspect. A failed secondary turbo valve is frequently misdiagnosed as full turbocharger failure, making it one of the most commercially significant diagnostic errors on this platform.
What causes C1A20 on a Land Rover Discovery 4?
C1A20 means the air suspension system is taking longer than expected to build pressure. The correct diagnostic sequence is supply-side first: check compressor output, the exhaust valve, the air dryer desiccant condition, and the reservoir check valve before investigating corner-level leaks. On high-mileage Discovery 4 and Range Rover L405 vehicles, a degraded dryer or weak compressor is a frequent cause of C1A20 that produces no visible external leak. Only move to air spring bladder and pipe union inspection once the supply side has been confirmed serviceable. Soap testing pipe joints and inspecting spring collars for cracking remains part of the second-stage diagnosis.
What causes P0171 and P0174 on a Range Rover P38 or Range Rover V8?
P0171 and P0174 indicate the engine is running lean on bank 1 and bank 2 respectively. P38A (4.0/4.6 V8): The primary cause is typically plenum chamber vacuum leaks from perished hoses or the inlet manifold gasket, followed by a failing MAF sensor. Range Rover L322 with BMW M62 4.4 V8 (naturally aspirated petrol only): These models are highly prone to Crankcase Ventilation (CCV) hose and separator deterioration, which produces lean conditions. The AJ 4.2L supercharged V8 (also fitted to L322) has a different CCV configuration and different diagnostic priorities — do not apply M62 CCV diagnosis to the supercharged variant without confirming the engine fitted. P0171/P0174 do not apply to L322 TDV8 diesel variants in this context. Always inspect the vacuum system and CCV hoses for cracks before replacing the MAF sensor.
What causes C1A00 on a Land Rover or Range Rover?
C1A00 indicates the air suspension compressor is not performing within specification. The compressor itself is the most common failure, but always check the relay and supply fuse first, as relay failure is inexpensive and frequently overlooked.
Important: On Range Rover L322 and Discovery 3/4 platforms, JLR changed the compressor supplier from Hitachi to AMK. If you are switching brands, a full software configuration via SDD is mandatory. Failure to update the software will cause the new AMK unit to run on the wrong duty cycle profile, leading to rapid overheating and premature internal failure.
What are Land Rover fault codes called in Dutch?
Land Rover fault codes are commonly referred to as “storingscodes” or “foutcodes” in Dutch. For example, issues like DPF blockage (DPF probleem), air suspension faults (luchtvering storing), or EGR issues are frequently searched using these terms in the Netherlands and Belgium.