P2C0BA Camshaft Profile Actuator Position Sensor B 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
- P2C0B reports that the circuit of position sensor B, the Hall feedback of the second intake actuator on bank 1, is shorted to ground. GM's L3B 2.7 L uses it with a resistance test while the output is on: at 0.5 ohm or less from signal to ground, 4 of 5 failed samples with supply over 11 V store a Type A code and the MIL comes on immediately (19OBDG03D, 25OBDG03B). Interestingly, GM's table wording for this test speaks of the sensor's solenoid driver, so the ECM judges the line from its output stage rather than from a sensor voltage. GM lists P2C0B only among the keywords of bulletins PIT5677 and 21-NA-149 on L3B harness chafing. Possible effects: stuck lift profile, no cylinder deactivation. Open: P2C09, short to power: P2C0C.
- What you may notice
- Check engine light on straight away
- Valve lift no longer changes, fuel use may rise
- Likely causes
- LikelyInsulation of the sensor B line worn through against engine metal
- PossibleShorted actuator 2 or its integrated Hall element
- RareMoisture or oil in the connector
- 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.