What does fault code ECM-P018800 mean?

Diagnostic fault code details for ECM-P018800 (Volvo S60 (2011–), Volvo S80 (2007–), Volvo V40 (2013–)). Repair service at OBD Tuning.

VOLVO

ECM-P018800 - Fuel Temperature Sensor "B" Circuit High. General Failure Information. No sub type information

System

Engine Control Module (ECM)

Volvo models this fault code applies to

Applies to the following models:

8 models

S60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V70 (2008–), XC60 (2009–), XC70 (2008–)

Show models by year and engine (8)

What does this fault code mean?

The control module (ECM) receives the temperature from each injector and compares the values with calibrated limits. The code is set when the temperature from the injector on cylinder 2 exceeds the highest permitted value. The cause may be looseness or oxidation in the connectors, or a damaged injector.

Possible causes

Loose connectors or oxidation in the connectors to the injectors
Damaged injector on cylinder 2

What you can do

1If there are codes for missing or faulty communication with the injectors, fix those first, as this code is then a follow-on fault
2Check the injector connectors, especially on cylinder 2, that they are secure and free from oxidation
3If you have a diagnostic tool: compare the temperature from each injector in live data and see whether cylinder 2 is high compared with the others
4Clear the code and run the engine to see whether it returns
5If the fault remains after these checks, the injector on cylinder 2 has to be replaced, which is a workshop job

Symptoms you may notice1

No noticeable symptoms for the driver

What the fault can affect1

The control module uses the temperature from one of the other injectors instead

General guidance for car owners. Diagnosis on the car can point to a different cause.