P005B
B Camshaft Profile Actuator A Control Stuck On Bank 1
Variable valve timing / lift
Generic OBD-II
High
What it means
P005B means the "B" camshaft profile actuator on bank 1 is stuck in its engaged (on) state — commanded off, but the valve-lift mode didn't change. These actuators are oil-operated, so dirty oil or a stuck oil control valve is a common cause, along with wiring or a seized actuator. It degrades running quality rather than stopping the engine.
High
Can I keep driving? Usually yes, with degraded performance — a valve-lift actuator stuck on causes rough running and lost power but doesn't normally stop the car.
Common symptoms
What you'll notice
- Check-engine light on
- Rough or unstable idle
- Reduced power and poor acceleration
- Slightly reduced fuel economy
Common causes
Most likely first
- 'B' camshaft profile / lift actuator on bank 1 mechanically stuck or seized onLikely
- Oil control valve stuck from dirty oil or sludgeCommon
- Restricted oil passage to the actuatorCommon
- Wiring or connector fault holding the actuator energizedLess often
- ECM fault (least likely)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data to confirm the conditions when it set.
- Check engine oil level and condition — sludge and old oil commonly cause these actuators to stick.
- Remove and test the 'B' profile control solenoid / oil control valve; clean or replace it.
- Verify the control wiring isn't shorted in a way that keeps the actuator commanded on.
- Replace the actuator if it's mechanically stuck; consider the ECM only after the rest checks out.
FAQ
Quick answers
Is it safe to drive with P005B?+
Short-term driving is usually possible but with reduced performance and rough running. Fix it before the stuck actuator strains the valvetrain further.
Can I just clear P005B?+
It returns until the actuator or oil control valve is freed or replaced. Fresh oil of the correct grade sometimes helps if sludge caused it.
Related codes
Often seen with P005B
Read & clear P005B yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX