DETECTION CONDITION AND POSSIBLE CAUSE (DTC P0012)

DTC P0012

CMP timing over-retarded

DETECTION CONDITION

Actual valve timing is over-retarded by 10° from the target valve timing for specified period when the oil control valve (OCV) system control is within the feedback range.
Monitoring condition
- Engine coolant temperature is above 63°C {145.4°F}

Diagnostic support note

This is a continuous monitor (CCM).
The 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

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.
The 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 the variable valve timing actuator
Loose timing chain or improper valve timing due to timing chain slippage
PCM malfunction

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

DTC P0012: Notes