Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information

Condition




The engine control module (ECM) checks that the camshaft is in the correct position (angle) in relation to the position (angle) of the crankshaft using signals from the camshaft sensor and engine speed (RPM) sensor. If the camshaft position does not correspond to the crankshaft position, the control module adjusts the adaption for the camshaft position. The adaption value corresponds to the difference in position between the camshaft and crankshaft when the crankshaft is in its default position. The diagnostic trouble code (DTC) is stored when adaption is greater or less than a certain value.
The diagnostic trouble code (DTC) can be diagnosed when adaption of the camshaft is carried out (adaption occurs during engine braking).

Substitute value
- Nothing.

Possible source
- Poor engine oil quality
- Incorrectly adjusted camshafts
- Damaged camshaft reset valve
- Damaged variable valve timing (VVT) unit.
- Damaged (worn) timing chain.

Fault symptom[s]
- 1Q, Driving/Poor performance/lacks power/At take off
- AA, Starting/Engine does not start/Engine turns
- AB, Starting/Engine hard to start/cranks slowly/Unsure when/at all times
- AE, Idling/Uneven idle
- AJ, Driving/Poor performance/lacks power
- AK, Driving/Hesitates/surges/Unsure when/at all times
- AL, Driving/Hesitates/surges/During acceleration
- AM, Driving/Hesitates/surges/During deceleration
- BB, Driving/Engine stalls/Unsure when/at all times
- BV, Driving/Hesitates/surges/At steady speed
- DL, Warning lights and chimes/Malfunction Indicator Light ("Check engine" light) indication/no indication