P03F7B Camshaft Position Actuator Position Sensor C Range/Performance Bank 1
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- On some engines the exhaust cam phaser (camshaft position actuator B) has its own position sensors, which tell the engine module where the phaser actually is; sensor C is the third of them, bank 1 the side with cylinder 1. This is a different family from the sliding-cam position sensors (P2C05 ff). P03F7 means the signal is electrically valid but implausible – it does not match the commanded phaser position or the camshaft and crankshaft sensors, jumps, or lies outside the adjustment range. No manufacturer document available to us uses this code (GM, Ford and FCA tables checked); the intake counterpart P03E5 ff is equally unused. The phaser is then usually held in its base position.
- What you may notice
- Check engine light on
- Exhaust cam phasing held in its base position, loss of power
- Possibly rough idle or poorer emissions
- Likely causes
- LikelySensor signal implausible (drift, loose target or magnet)
- PossiblePhaser stiff, actual position deviates
- PossibleLoose contact or interference
- RareValve timing wrong after a repair
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €100 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.