P2B54: 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. 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.

Medium severity. Can I keep driving?Drive little and gently. If you hear timing chain noise or the oil light comes on, shut off the engine.

Bank 2 is the side without cylinder 1, so it only exists on V or boxer engines.

Symptoms

Check engine light on
Uneven running between the banks, especially at part load
Profile switching disabled by the engine control

Most likely causes

Actuator B on the bank 2 intake camshaft stays engaged (sticking plunger)
Control line shorted so the solenoid remains energised
Position feedback of the actuator stuck at the engaged value

What to check, in order

Start with the simplest. You can tick off each step.

Check the oil level and condition before anything else
Use the scanner to command the movement and compare the actual position with the requested one.
Check the solenoid valve's connector
Compare commanded and actual angles in live data
Test the solenoid valve and its filter, if it has one
Check the engine timing if there is chain noise

Good to know

Repair difficulty: medium
It can trigger limp mode.
It affects emissions.

What each character of P2B54 means

P: Powertrain: engine and transmission
2: Generic code: same on every make
B: Subsystem depends on the code range
54: Specific fault in that system

Frequently asked questions

Can I keep driving with code P2B54?

Drive little and gently. If you hear timing chain noise or the oil light comes on, shut off the engine.

What causes code P2B54?

The most common causes are: actuator B on the bank 2 intake camshaft stays engaged (sticking plunger); control line shorted so the solenoid remains energised; position feedback of the actuator stuck at the engaged value.

Related codes

Sources

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.