DTC ECM-641A

Condition







When camshaft control is active, the control module checks the position of the camshaft in relation to the position of the crankshaft. Diagnostic trouble code (DTC) ECM-640A (camshaft intake) or ECM-641A (camshaft exhaust) is stored if the position of the camshaft deviates from the requested position in relation to the crankshaft over a certain amount of time.

Substitute value
- None.

Possible source

Faulty control:
- Low oil pressure
- Poor oil quality
- Defective reset valve
- Mechanical fault in the variable valve timing (VVT) unit.

Fault symptom[s]
- Malfunction indicator lamp (MIL) lit.