P2C0AA Camshaft Profile Actuator Position Sensor B 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
- Here the wiring of position sensor B is intact, but its report does not match what the second intake actuator on bank 1 was told to do. On the L3B, GM follows every shift through three Hall readings: below 55 while the pin is moving out, below 45 once fully out, and above 68 when it is back home. P2C0A is stored if this sequence is not seen after a command, or if the feedback shows pin activity although the ECM never asked for a shift. Four bad readings in five, engine running, more than 11 V and no crank or cam sensor codes are required; Type A, MIL at once (19OBDG03D, 25OBDG03B). A slow or sticking pin, a worn shift groove or poor oil are therefore likelier culprits than wiring. CARB requires the lift system to catch cylinders running on the wrong cam profile.
- What you may notice
- MIL on at once
- Engine kept on a fixed cam profile, no cylinder deactivation
- Possible ticking from the camshaft carrier or slightly uneven idle
- Likely causes
- LikelyPin of actuator 2 sticking or slow (wear, sludge, wrong oil)
- PossibleWorn shift groove or detent on the intake cam sleeve
- RareHall element in the actuator reporting implausible levels
- 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 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.