Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-673C

Condition




The engine control module (ECM) checks the angle of the camshaft (its position in relation to the crankshaft).
If the angle of the exhaust camshaft is too high (the camshaft is "in front of" the crankshaft), the engine control module (ECM) will adapt the angle of the camshaft. The diagnostic trouble code (DTC) is stored if the adaptation value is above a certain level. The diagnostic trouble code (DTC) can be diagnosed when the engine is at operating temperature and is idling.

Substitute value
None.

Possible source
- Poor engine oil quality
- Incorrectly adjusted camshafts
- The timing gear belt has jumped off the cogs
- Damaged camshaft reset valve
- Mechanical fault in the variable valve timing (VVT) unit.

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