P03E7A Camshaft Position Actuator Position Sensor C Circuit Low 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 intake cam phaser (camshaft position actuator A) 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. P03E7 means the sensor signal stays below its lower limit – signal or reference wire shorted to ground, supply open, or the sensor shorted internally; if the 5 V reference is the cause, other sensors on the same circuit often set codes too. No manufacturer document available to us uses this code. GM's 2.7-litre engine monitors comparable position sensors on its sliding camshaft under other codes (P2C05 ff), with an open circuit above 200 kΩ and a short below 0.5 Ω in 4 of 5 samples – only as a comparison. The phaser is then usually held in its base position.
- What you may notice
- Check engine light on
- Cam phasing held in its base position, loss of power
- Possibly rough idle or higher consumption
- Likely causes
- LikelySignal wire shorted to ground (chafed harness)
- Possible5 V supply open or shorted
- PossibleSensor faulty internally
- RareEngine module
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €60 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.