Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-640F

Condition
The engine control module (ECM) checks that the camshaft is in the correct position in relation to the position of the crankshaft. If the camshaft position is incorrect, the control module will adjust the adaptation for the camshaft position. The diagnostic trouble code (DTC) is stored if the adaptation is too great.
The diagnosis is active when the engine is on and is warm.

Substitute value
- None.

Possible source

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

Signal too low
- Poor quality engine oil.
- The timing gear belt has jumped off the cogs.
- Incorrectly adjusted camshafts.

Fault symptom[s]
- Malfunction indicator light (MIL), on
- Uneven idle
- High emissions
- Engine stalls when driving