Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-6404

Condition




The engine control module (ECM) checks that the actual camshaft angle position (actual value for the camshaft shift angle) corresponds to the requested angle position (target value for the camshaft shift angle). The diagnostic trouble code (DTC) is stored if the value for the actual camshaft angle position is higher (signal too high) or lower (signal too low) than the control module target value for the camshaft angle position.
The fault code is diagnosed with the engine running and catalytic converter heating in progress (engine temperature between -10 and 80 °C).

Substitute value
- None.

Possible source

Signal too high
- Short-circuit to supply voltage in the signal cable.
- Poor engine oil quality
- VVT-unit tightened with too high torque against camshaft.
- Damaged camshaft reset valve
- Mechanical fault in the continuous variable valve timing (CVVT) unit.

Signal too low
- Not detectable.

Fault symptom[s]
- Uneven idle
- Increased emissions
- The engine cuts out when driving.