Cam Calibration Fault
The engine's computer can't properly synchronize the camshaft position with the crankshaft timing, like a drummer whose beat is out of sync with the bassist. This prevents the engine from running efficiently and may cause it to run rough or hesitate.
The ECU compares camshaft position sensor signals against crankshaft reference timing to verify proper cam phasing. It monitors the correlation between cam tooth edges and crankshaft position to ensure they align within a specific window. If the variance exceeds the acceptable threshold, a calibration fault is logged.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Cam-to-Crank Timing Correlation | ±5 degrees crankshaft angle | >±5 degrees deviation |
| Cam Position Sensor Signal Quality | Clean, consistent square wave | Weak, intermittent, or missing signal |
Code P1182 is a moderate fault. You can generally drive to a workshop, but avoid long trips or high-load driving (motorway, uphill towing) until it is diagnosed. If the code keeps returning after clearing, or if you notice the symptoms listed above worsening, do not delay professional diagnosis. Many moderate codes have multiple possible root causes — a mechanic with live OBD data can identify the exact fault more efficiently than part-by-part trial and error.
Once the fault is repaired, P1182 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.
The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.