P2B56
B Camshaft Profile Actuator B Control Stuck On Bank 2
The control circuit of camshaft profile actuator B on the exhaust side of bank 2 reports a control stuck on condition. Cam profile B (high-lift or VTEC-style) cannot be commanded reliably.
The control circuit of camshaft profile actuator B on the exhaust side of bank 2 reports a control stuck on condition. Cam profile B (high-lift or VTEC-style) cannot be commanded reliably.
Common causes
- high
Actuator stuck in high-lift position
One of the most commonly reported causes for this code — check this first.
Typical part cost: $170-880
- medium
Release pressure path blocked
A plausible cause — test and verify before replacing parts.
Typical part cost: $170-880
See all causes + fix costs
Create a free Wrenchify account to unlock the rest for P2B56.
Unlock causesFree forever · No credit card
First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
Get the full step-by-step diagnosis
Create a free Wrenchify account to unlock the rest for P2B56.
Unlock diagnosisFree forever · No credit card
Related codes
See related trouble codes
Create a free Wrenchify account to unlock the rest for P2B56.
Unlock related codesFree forever · No credit card
Frequently asked questions
What does P2B56 mean?
P2B56 means "B Camshaft Profile Actuator B Control Stuck On Bank 2". It is a generic OBD-II code that points to a fault in the auxiliary emission controls.
What are the most common causes of P2B56?
actuator stuck in high-lift position; release pressure path blocked; carbon or debris buildup preventing free movement — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly. Use the Wrenchify app for a full diagnosis specific to your vehicle.
Get the full P2B56 diagnosis for your vehicle
Year, make, model + step-by-step repair help — free plan included.