P2C15B Camshaft Profile Actuator Position Sensor A Circuit High 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
- P2C15 stands for a short to voltage on the exhaust position sensor A circuit, bank 1, i.e. the Hall feedback of GM's first exhaust actuator on the L3B four. This test runs with the output switched off: if a resistance of 0.5 ohm or less to controller power remains on the line, four failed reports in five at more than 11 V produce a Type A code, MIL at once (19OBDG03D, 25OBDG03B). P2C15 belongs to the main code list of PIT5677 and of 21-NA-149 for 2019 to 2021 L3B trucks. From the A revision on, these bulletins also mention blown underhood fuses alongside no-start, rough running and reduced power, so a short to power is often only one symptom of a larger harness fault. Exhaust lift changes stop. Open: P2C12, ground short: P2C14.
- What you may notice
- MIL lit straight away
- Exhaust cam profile stays fixed
- Together with harness damage, blown fuses, no start or reduced power possible
- Likely causes
- LikelyChafed harness letting the sensor line touch a supply wire (GM PIT5677, 21-NA-149)
- PossibleShort to supply inside exhaust actuator 1
- RareDefective output stage in the ECM
- 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.