Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information

Condition
The diagnostic trouble code (DTC) is stored if the engine control module (ECM) detects misfiring which could damage the catalytic converter after the first 1000 engine revolutions after the engine is started. The diagnostic trouble code (DTC) indicates which cylinder is misfiring. The diagnostic trouble code (DTC) can be diagnosed when the engine is running.
- ECM-P0301XX: cylinder 1.
- ECM-P0302XX: cylinder 2.
- ECM-P0303XX: cylinder 3.
- ECM-P0304XX: cylinder 4.
- ECM-P0305XX: cylinder 5.

Substitute value
- Rear heated oxygen sensor control shut off
- Fuel trim switched off.

Possible source
- Low fuel level
- Engine does not reach normal operating temperature between several cold starts
- Water in the spark plug wells
- Damaged spark plug
- Contaminated or incorrect fuel
- Poor fuel quality (summer fuel in winter).
- Air leakage
- Blocked crankcase ventilation.
- Damaged VVT-unit.
- Blocked / leaking injector
- Faulty fuel pressure
- Uneven compression

Fault symptom[s]
- Starting/Engine hard to start/cranks slowly/Unsure when/at all times
- Idling/Uneven idle
- Driving/Poor performance/lacks power
- Driving/Hesitates/surges/Unsure when/at all times
- Warning lights and chimes/Malfunction Indicator Light ("Check engine" light) indication/no indication