DTC P0021: Notes
WARNING: This page is about a different variant/trim than selected.
DTC P0021 [AJ] DETECTION CONDITION AND POSSIBLE CAUSES
| DTC P0021 |
CMP timing over-advanced (LH) |
| DETECTION CONDITION |
- The actual valve timing is over-advanced by 20°
from the target valve timing when the OCV is controlled in the maximum valve timing retard condition.
MONITORING CONDITIONS
- Engine coolant temperature is above 63 °C {145 °F}
Diagnostic support note
- This is a continuous monitor (CCM).
- MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle.
- FREEZE FRAME DATA is available.
- DTC is stored in PCM memory.
|
| POSSIBLE CAUSE |
- Oil control valve malfunction
- Spool valve in OCV (LH) is stuck in advance position.
- Variable valve timing actuator (LH) is stuck in advance position.
- Loose timing chain or improper valve timing
- PCM malfunction
|