What does fault code ECM-P030298 mean?

Diagnostic fault code details for ECM-P030298 (Volvo S60 (2011–), Volvo S80 (2007–), Volvo S80 (2007–)). Repair service at OBD Tuning.

VOLVO

ECM-P030298 - Cylinder 2 Misfire Detected. Component Failures. Component or system over temperature

System

Engine Control Module (ECM)

Volvo models this fault code applies to

Applies to the following models:

3 models

S60 (2011–), S80 (2007–), V70 (2008–)

Show models by year and engine (9)

What does this fault code mean?

Misfires on cylinder 2 that can damage the catalytic converter are registered by the engine control module (ECM) shortly after the engine starts. It points to cylinder 2 and belongs to the overheating codes, because unburned fuel can make the catalytic converter too hot.

Possible causes

Low fuel level
The engine does not reach operating temperature between several cold starts
Poor fuel quality, for example summer fuel in winter
Clogged or leaking injection valve
Uneven compression
Incorrectly calculated ethanol content

What you can do

1Read the fault codes; codes for camshaft control should be traced first
2Check that the intake system does not leak and that the crankcase ventilation is clear
3Check that the fuel level is sufficient and that the fuel suits the season
4If you have a diagnostic tool: read the misfire counters for each cylinder in live data and see whether cylinder 2 differs
5Have a workshop with diagnostic equipment check the injection valve and the compression on cylinder 2

Symptoms you may notice5

The engine is hard to start and cranks slowly
Uneven idle
The engine lacks power and performs poorly
The engine hesitates, surges or runs roughly when driven
The Check engine light lights up or behaves abnormally

What the fault can affect2

Rear oxygen sensor control is switched off
Lambda control is switched off

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