What does fault code ECM-P030098 mean?

Diagnostic fault code details for ECM-P030098 (Volvo S60 (2011–), Volvo S80 (2007–), Volvo S80 (2007–)). Repair service at OBD Tuning.

VOLVO

ECM-P030098 - Random 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 fault code is stored when the engine control module (ECM) detects misfires on several cylinders that can damage the catalytic converter. Unburned fuel that reaches the exhaust system can cause the catalytic converter to overheat. The code is part of a misfire series and does not replace the cylinder code that shows which cylinder is affected.

Possible causes

Poor fuel quality, for example summer fuel in winter
Clogged crankcase ventilation
Damaged VVT unit
Uneven compression
Incorrectly calculated ethanol content
Low fuel level

What you can do

1This code has no fault tracing of its own; read the cylinder-specific codes to see which cylinders misfire
2Check that the fuel level is sufficient and that the fuel suits the season
3Check the crankcase ventilation hoses and valve for clogging
4If you have a diagnostic tool: read the misfire counters for each cylinder in live data with the engine running and see whether any of them stands out
5Have a workshop with diagnostic equipment check the VVT unit, the compression and the fuel pressure

Symptoms you may notice5

The engine is hard to start and cranks slowly
Uneven idle
The engine feels short of power
The engine jerks or hesitates when driven
The Check engine light lights up or behaves abnormally

What the fault can affect3

The catalytic converter diagnosis is switched off
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.