P2B54A Camshaft Profile Actuator B Control Stuck On Bank 2
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- With P2B54 actuator B, the second shifter on the bank 2 intake camshaft, is reported as stuck on, meaning its pin or valve stays engaged after the command to release. A public manufacturer description of this exact code was not found. GM's L3B tables show how the bank 1 twin, P2B53, is judged: the Hall feedback must return to the retracted level within the engine cycle, otherwise a stuck pin is assumed. NTN-SNR describes P2B54 as component permanently active, and CARB requires valve control faults of this kind to be detected under (e)(13). On a V-engine only one bank would then run the wrong intake lift, which can cause uneven running between banks. Bank 1: P2B53; stuck off: P2B50.
- What you may notice
- Check engine light on
- Uneven running between the banks, especially at part load
- Profile switching disabled by the engine control
- Likely causes
- LikelyActuator B on the bank 2 intake camshaft stays engaged (sticking plunger)
- PossibleControl line shorted so the solenoid remains energised
- RarePosition feedback of the actuator stuck at the engaged value
- 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: €80 – €800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.