P2B54 code meaning
A Camshaft Profile Actuator B Control Stuck On Bank 2
Powertrain system Generic code P2Bxx codes Check engine light
What P2B54 means
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.
P2B54 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2B54
- Check engine light on
- Uneven running between the banks, especially at part load
- Profile switching disabled by the engine control
Common causes of P2B54
- Most likelyActuator B on the bank 2 intake camshaft stays engaged (sticking plunger)
- PossibleControl line shorted so the solenoid remains energised
- Less likelyPosition feedback of the actuator stuck at the engaged value
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
A camshaft profile actuator b b2Wiring harnessECM
What each part of P2B54 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| B | Area: hybrid propulsion. |
| 54 | The exact fault in that area. |
What to do next
- Note P2B54 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2B54
What does P2B54 mean?
P2B54 means "A Camshaft Profile Actuator B Control Stuck On Bank 2". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P2B54?
Drive gently and only to a workshop. With P2B54 the car can go into limp mode (reduced power) to protect itself.
Will P2B54 fail an emissions test?
Yes, it can. P2B54 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2B54 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P2B54 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.