What does fault code ECM-P029E00 mean?

Diagnostic fault code details for ECM-P029E00 (Volvo C30 (2007–2013), Volvo S40 (2004–2013), Volvo S60 (2011–)). Repair service at OBD Tuning.

VOLVO

ECM-P029E00 - Cylinder 2- Fuel Trim at Max Limit. General Failure Information. No sub type information

System

Engine Control Module (ECM)

Volvo models this fault code applies to

Applies to the following models:

9 models

C30 (2007–2013), S40 (2004–2013), S60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V50 (2004–2013), V60 (2011–), V70 (2008–)

Show models by year and engine (9)

What does this fault code mean?

The engine control module (ECM) compensates for small variations in combustion by adjusting the fuel amount per cylinder. For cylinder 2, the code is stored when the adjustment needs more fuel than the highest permitted adjustment. The fault is detected at idle when the engine is warm. The code is general and does not say what type of fault it is.

Possible causes

Fault related to the injectors
Deal first with another fault code, if one is stored
Incorrectly programmed injector class
Incorrectly fitted injector
Leaking injector
Uneven or poor compression

What you can do

1Read the fault codes; if another fault code is stored, deal with it first and then check whether this code returns
2Check the connector to the cylinder 2 injector, that it is firmly seated and free from oxidation
3Have a workshop check that the correct injector class is programmed and that the cylinder 2 injector is seated correctly and not leaking
4Have a workshop with diagnostic equipment measure the compression in cylinder 2

Symptoms you may notice1

The engine runs unevenly at idle

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