What does fault code ECM-P030498 mean?

Diagnostic fault code details for ECM-P030498 (Volvo S60 (2011–), Volvo S80 (2007–), Volvo S80 (2007–)). Repair service at OBD Tuning.

VOLVO

ECM-P030498 - Cylinder 4 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?

The catalytic converter can overheat if cylinder 4 misfires so that unburned fuel reaches the exhaust system. The engine control module (ECM) sets the fault code when such misfires are detected early after the engine starts.

Possible causes

Poor fuel quality
Clogged or leaking injection valve
Incorrect fuel pressure
Air leak
Uneven compression
Incorrectly calculated ethanol content

What you can do

1Read the fault codes; camshaft-related codes should be traced first
2Check that the fuel suits the season and that the fuel level is sufficient
3Check that the intake system and the crankcase ventilation do not leak or are not clogged
4If you have a diagnostic tool: read the misfire counter for cylinder 4 in live data with the engine running and see whether it is raised compared with the other cylinders
5Have a workshop with diagnostic equipment check the injection valve and the VVT unit on cylinder 4, and the compression

Symptoms you may notice5

The engine is hard to start
Uneven idle
Poor performance
The engine hesitates and surges while 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.