Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information ECM-P001800

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 does not match the crankshaft position, the control module will adjust the adaptation for the camshaft position. The adaptation value corresponds to the difference between the camshaft and crankshaft.

The diagnostic trouble code (DTC) is stored if the control module detects that:
- Change in the adaptation value is larger than what corresponds to a tooth.
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Hot engine.
- During engine start-up.

Note! The control module can only detect the fault once the test has been started and the diagnostic trouble code (DTC) is stored when the conditions are met.

Substitute value
- None.

Possible source
- Incorrectly adjusted camshafts.
- Damaged VVT-unit.
- Over cogging in the camshaft transmission.

Fault symptom[s]
- Uneven idle
- Engine is difficult to start