DTC P0012: Notes

DTC P0012 DETECTION CONDITION AND POSSIBLE CAUSES

DTC P0012	CMP Timing over-retarded
DETECTION CONDITION	California emission regulation applicable ATX model Actual valve timing is over-retarded by 10 ° (when the following conditions are met) from target valve timing for 5 s when the OCV system control is within feedback range. MONITORING CONDITION Engine coolant temperature is above 20 °C {68 °F} . Diagnostic support note This is a continuous monitor (CCM). MIL illuminates if PCM detects above malfunction condition in two consecutive drive cycles or in one drive cycle while DTC for the same malfunction has been stored in PCM. PENDING CODE is available if PCM detects the above malfunction condition during first drive cycle. FREEZE FRAME DATA is available. DTC is stored in the PCM memory.
Except for California emission regulation applicable ATX model Actual valve timing is over-retarded by 10 ° (when the following conditions are met) from target valve timing for 5 s when the OCV system control is within feedback range. MONITORING CONDITION Engine speed is below 4, 000 RPM. Engine coolant temperature is above 70-110 °C {158-230 °F}. Diagnostic support note This is a continuous monitor (CCM). MIL illuminates if PCM detects above malfunction condition in two consecutive drive cycles or in one drive cycle while DTC for the same malfunction has been stored in PCM. PENDING CODE is available if PCM detects the above malfunction condition during first drive cycle. FREEZE FRAME DATA is available. DTC is stored in the PCM memory.
POSSIBLE CAUSE	OCV (oil control valve) malfunction Low engine oil pressure Spool valve in OCV (oil control valve) 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 oil pressure switch and OCV (oil control valve) Between OCV (oil control valve) and variable valve timing actuator In variable valve timing actuator Loose timing chain or improper valve timing due to timing chain slippage PCM malfunction

DTC P0012

CMP Timing over-retarded

DETECTION CONDITION

California emission regulation applicable ATX model

Actual valve timing is over-retarded by 10 ° (when the following conditions are met) from target valve timing for 5 s when the OCV system control is within feedback range.
MONITORING CONDITION
- Engine coolant temperature is above 20 °C {68 °F} .

Diagnostic support note

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

Except for California emission regulation applicable ATX model

Actual valve timing is over-retarded by 10 ° (when the following conditions are met) from target valve timing for 5 s when the OCV system control is within feedback range.
MONITORING CONDITION
- Engine speed is below 4, 000 RPM.
- Engine coolant temperature is above 70-110 °C {158-230 °F}.

Diagnostic support note

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

POSSIBLE CAUSE

OCV (oil control valve) malfunction
Low engine oil pressure
Spool valve in OCV (oil control valve) 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 oil pressure switch and OCV (oil control valve)
- Between OCV (oil control valve) and variable valve timing actuator
- In variable valve timing actuator
Loose timing chain or improper valve timing due to timing chain slippage
PCM malfunction