Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-674D

Condition




The engine control module (ECM) checks the angle of the camshaft (its position in relation to the crankshaft).

If the intake camshaft's angle position deviates and is too low (the camshaft is "after" the crankshaft) during fuel trim, the Engine control module (ECM) interprets this as a fault and stores a DTC.
The control module's test for the diagnostic trouble code (DTC) starts when:
- Engine idling
- Hot engine.

Substitute value
None.

Possible source
- Poor engine oil quality
- Incorrectly adjusted camshafts
- The timing gear belt has jumped off the cogs.

Fault symptom[s]
- Warning lights and chimes/Malfunction Indicator Light ("Check engine" light) indication/no indication