Your engine's camshaft timing sensor isn't syncing properly with the crankshaft, like a drummer falling out of beat with the rest of the band. The engine computer detected that Bank 1's cam timing is outside the acceptable range.
The ECM compares camshaft position signals from Bank 1 against crankshaft timing to verify proper valve timing correlation. It monitors the phasing angle between these two sensors and flags a fault when the deviation exceeds calibrated thresholds, indicating timing slippage or sensor degradation.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Cam-to-Crank Phase Angle (Bank 1) | ±5 degrees BTDC at idle | >10 degrees deviation or sensor dropout |
| Camshaft Position Signal Frequency | Consistent correlation with RPM | Intermittent or missing signal pulses |