What it means
Cam profile actuator A position C is stuck engaged when commanded off — typically a stuck oil control valve.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
How it works
The Bank 1 camshaft profile actuator A position C mechanism should disengage when the engine control module removes its command. This code sets when position C remains engaged, commonly because its oil control valve is stuck open or the profile mechanism cannot return.
Common causes
Most likely first.
- Oil control valve stuck open
- Carbon or debris buildup preventing free movement
- Component wear with age - mechanical play
Symptoms
- Check engine light on
- Power loss especially in mid-rpm range
- Possible rough idle or stalling
- Increased fuel consumption
How to diagnose it
- Check freeze-frame and live data for whether Bank 1 actuator A remains at position C after the module commands it off.
- Check oil level and condition for contamination that could interfere with the position C oil control valve.
- Inspect the position C solenoid connector and wiring for damage or a fault that could leave the valve energized.
- Test whether the control circuit releases the solenoid command when requested, following the wiring diagram and manufacturer's procedure.
- If the electrical command releases correctly, inspect the oil control valve and profile actuator for sticking, debris, or mechanical wear.
Common fixes
- Correct contaminated or incorrect engine oil and verify the specified oil level.
- Repair wiring or connector faults that keep the position C valve energized.
- Clean or replace the Bank 1 position C oil control valve if it is confirmed stuck open.
- Repair or replace the actuator or lock pin if the profile mechanism remains engaged from mechanical wear.
Can I keep driving?
Avoid high load and unnecessary driving because the Bank 1 cam profile may remain engaged when it should disengage, affecting power and idle quality. Stop if the engine stalls or runs very roughly.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.