P2C07A Camshaft Profile Actuator Position Sensor A 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 GM's 2.7 L turbo four L3B (Silverado and Sierra 1500 from 2019) each of the four intake sliding-cam actuators reports its pin travel through a Hall element; GM calls the first one intake Hall sensor 1, which is position sensor A in J2012 terms. P2C07 means this circuit is pulled to ground. The ECM checks it with the output stage switched on and treats an impedance of 0.5 ohm or less between signal and ground as a short; 4 failures in 5 samples with more than 11 V supply set a Type A code, MIL in the first trip (19OBDG03D, 25OBDG03B). GM bulletin 21-NA-149 names P2C07 only in its keyword list for chafed L3B engine harnesses. Pin feedback is lost, so lift switching and cylinder deactivation are blocked. Open circuit is P2C05, short to power P2C08.
- What you may notice
- Check engine light on from the first drive
- Engine stays on one lift profile, no cylinder deactivation, slightly higher consumption
- With harness damage, possibly blown fuses and many further codes
- Likely causes
- LikelyEngine harness chafed through to ground, e.g. over the camshaft carrier cover
- PossibleInternal short to ground in the profile actuator or its Hall element
- RareOil or water in the actuator connector bridging to ground
- 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: €50 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.