P2C2FTurbocharger/Supercharger Bypass Valve B Driver Current/Temperature Too High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2C2F is stored when the output stage driving compressor bypass valve B signals excessive current or overheating. The motor driver protects itself by limiting current and finally switching off, and reports this to the engine module. No manufacturer documents P2C2F; GM documents the A-side code P2BC0 for the supercharged 2019 LT5: a raised driver flag in 80 of 100 checks at 12.5 ms, with relay voltage of 11 V or more and no cranking, gives a Type A fault. NXP's MC33926 bridge, a typical part for such loads, regulates overcurrent and shuts down on overtemperature. Excess current mostly stems from a jammed valve working against its stop, a shorted motor winding or touching motor leads. Valve B overheating itself is P00D8; low supply to the same driver is P2C2E.
- What you may notice
- Check engine light
- Valve stops responding, boost reduced
- Likely causes
- LikelyJammed valve forcing the motor to stall against its stop
- PossibleShorted winding in the valve actuator motor
- PossibleMotor leads shorted to each other or to ground
- RareOverheated or faulty driver inside the engine module
- 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: €150 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.