DTC P0021: Notes

DTC P0021 (MZI-3.5) DETECTION CONDITION AND POSSIBLE CAUSES

DTC P0021	CMP timing over-advanced (LH)
DETECTION CONDITION	The PCM monitors the variable valve timing position for an over-advanced camshaft timing. The test fails when the camshaft timing exceeds a maximum calibrated value or remains in an advanced position.
POSSIBLE CAUSE	OCV (LH) malfunction Spool valve in OCV (LH) is stuck in advanced position Improper valve timing due to timing chain slippage