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ERR2081 - Coolant Temperature Sensor – Cylinder Head

Original price - Original price €6,90
Original price
€6,90
€6,90 - €6,90
Current price €6,90
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OEM Part
OEM: Made by an Original Equipment Manufacturer. This part is made by an original equipment manufacturer or under their license, ensuring compatibility and quality.
Brand Lucas
Coolant Temperature Sensor threads into the cylinder head and reports engine coolant temperature to the engine management system and the instrument temperature gauge.

This is a sensor rather than a switch. Its temperature-dependent resistance element varies continuously with coolant temperature to produce a measurement signal, where a thermal switch simply opens or closes a circuit at one fixed set point. The engine management system uses the signal to adjust fuelling during warm-up and cold running, and to drive the temperature gauge.

Fitted to 300 TDi, Td5 2.5L 5-cylinder turbo diesel and 2.0L L-Series diesel applications. On Td5 engines the same sensor is also used on the fuel connector block to measure fuel temperature.
Vehicle Model Land Rover Defender up to 2016
Land Rover Discovery 1 1989-1998 (L318)
Land Rover Discovery 2 1998-2004 (L318)
Land Rover Freelander 1 1996-2006 (L314)
Range Rover Classic up to 1994
Fitment Notes DEFENDER 1987-2006 — 300TDi & 2.5L Td5 5-Cyl Turbo Diesel
DISCOVERY 1 1989-1998 — 2.5L 300TDi
DISCOVERY 2 1998-2004 — Petrol & 2.5L Td5 Turbo Diesel
FREELANDER 1 1996-2006 — 2.0L I4 TCIE Diesel
RANGE ROVER CLASSIC 1992-1994 (from JA610294) — 2.5L 300TDi
Alternative Codes
ERR2081ERR2081LN12X1.5

In stock 7 units
6 · Gouda 1 · Drachten
Express delivery available

When will my order arrive?
  • Order before 15:00 (Mon–Fri): same-day dispatch for in-stock items.
  • UPS Express (order before 14:00): dispatched today, delivered tomorrow where available.
  • Netherlands / Belgium / Germany: 2–4 working days.
  • Other EU countries + UK: 4–8 working days.
  • Outside EU/UK: delivery times vary — contact us for an estimate.

Items may ship from multiple warehouses at no extra cost.

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Frequently asked questions

What does the ERR2081 coolant temperature sensor do?
The ERR2081 coolant temperature sensor reads engine coolant temperature at the cylinder head and feeds that signal to the ECU and the dashboard gauge. On 300Tdi and Td5 engines the ECU typically uses it for fuelling and cold start enrichment. It threads directly into the cylinder head.
Where is the ERR2081 sensor fitted on a 300Tdi or Td5?
The ERR2081 fits into the cylinder head, typically towards the front of the engine near the thermostat housing and coolant outlet. On Defender and Discovery 300Tdi engines it usually sits alongside other coolant sensors, so check which connector you're unplugging before removal.
What are the signs the coolant temperature sensor needs replacing?
Common symptoms are an erratic or dead temperature gauge, hard cold starting, black smoke and poor fuel economy. On Td5 Discovery 2 and Defender models a failing ERR2081 can log a coolant temperature fault and push the ECU onto a default fuelling map. Cooling fans may also run constantly.