Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information

Condition
The engine control module (ECM) checks engine combustion regarding misfire by registering speed deviations in flywheel rotation. If a certain number of misfires are detected for several cylinders during a certain number of crankshaft rotations, the misfires are considered emission-related or capable of damaging the catalytic converter and the diagnostic trouble code is generated.
The diagnostic trouble code can be diagnosed when the engine is running.
The trouble code indicates which cylinder is misfiring:
- ECM-P030100, cylinder 1 misfire.
- ECM-P030200, cylinder 2 misfire.
- ECM-P030300, cylinder 3 misfire.
- ECM-P030400, cylinder 4 misfire.
- ECM-P030500, cylinder 5 misfire.
- ECM-P030600, cylinder 6 misfire.

Substitute value
- Nothing.

Possible source
- Low fuel level.
- Repeated cold starts where the engine temperature does not reach proper operating temperature between starts.
- Damaged spark plug.
- Contaminated or wrong fuel.
- Wrong fuel grade (summer fuel in the winter, certain markets).
- Air leakage.
- Damaged VVT-unit.
- Clogged/leaking injector.
- Faulty fuel pressure.
- Uneven compression.

Fault symptom[s]
- Malfunction indicator lamp (MIL) lit.
- Malfunction indicator lamp (MIL) flashes.
- Engine misfire.
- Engine reluctant to start.
- Poor performance.
- Uneven idle.
- The engine does not run on all cylinders.
- Message in the display.