DTC P0012: Notes

DTC P0012 DETECTION CONDITION AND POSSIBLE CAUSES

DTC P0012	CMP Timing over-retarded
DETECTION CONDITION	Actual valve timing is over-retarded by 10° from the target valve timing for 5 s when the OCV system control is within the feedback range. Monitoring condition Engine speed is below 4,000 RPM Engine coolant temperature is 70-110°C {158-230°F} Diagnostic support note This is a continuous monitor (CCM). MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM. PENDING CODE is available If the PCM detects the above malfunction condition during the first drive cycle. FREEZE FRAME DATA is available. The DTC is stored in the PCM memory.
POSSIBLE CAUSE	Oil control valve (OCV) malfunction Low engine oil pressure Spool valve in the OCV is stuck in retard position. Variable valve timing actuator is stuck in retard position. Following oil runners are clogged or have leakage. Oil runners Between the oil pressure switch and the OCV Between the OCV and the variable valve timing actuator In variable valve timing actuator Loose timing chain or improper valve timing due to the timing chain slippage PCM malfunction

DTC P0012

CMP Timing over-retarded

DETECTION CONDITION

Actual valve timing is over-retarded by 10° from the target valve timing for 5 s when the OCV system control is within the feedback range.
Monitoring condition
- Engine speed is below 4,000 RPM
- Engine coolant temperature is 70-110°C {158-230°F}

Diagnostic support note

This is a continuous monitor (CCM).
MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
PENDING CODE is available If the PCM detects the above malfunction condition during the first drive cycle.
FREEZE FRAME DATA is available.
The DTC is stored in the PCM memory.

POSSIBLE CAUSE

Oil control valve (OCV) malfunction
Low engine oil pressure
Spool valve in the OCV is stuck in retard position.
Variable valve timing actuator is stuck in retard position.
Following oil runners are clogged or have leakage.
Oil runners
- Between the oil pressure switch and the OCV
- Between the OCV and the variable valve timing actuator
- In variable valve timing actuator
Loose timing chain or improper valve timing due to the timing chain slippage
PCM malfunction