P03E9A Camshaft Profile Actuator Position Sensor A Exceeded Learning Limit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- Engines with cam profile switching move the intake camshaft between lift profiles with actuators – for example pins that shift a sliding cam – and position sensors report which profile is engaged. The engine module learns reference values of position sensor A, such as its end-position levels or the expected pulse position relative to the crankshaft and camshaft sensors; a Ford patent describes correcting this position for the cam phase. P03E9 means the learned value lies outside the permitted adaptation limit, so profile detection is no longer reliable and the module usually stays in a safe profile. No manufacturer document available to us describes the code or its limits; GM's 2.7-litre sliding cam has no learning-limit code. CARB lists a pin that does not reach its position among the faults to be detected.
- What you may notice
- Check engine light on
- Profile switching disabled: less power at high revs or higher consumption
- Possibly further profile actuator or sensor codes
- Likely causes
- LikelyPosition sensor A or actuator with integrated sensor worn or faulty (signal drift)
- PossibleActuator pin or sliding piece stiff, guide worn, dirty oil
- PossibleActuator not relearned or wrongly fitted after replacement
- RareConnector or wiring with contact resistance
- RareEngine module software (learning algorithm)
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €150 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.