A Camshaft Profile Actuator A Control Stuck On Bank 1
The intake cam profile actuator (profile A, bank 1) stays engaged when commanded off — stuck in high-lift profile. Idle quality and emissions affected.
Affected components
- Cam profile actuator
- Oil control valve
Common causes
- High likelihood: Locking pin stuck engaged
- Medium likelihood: Oil control valve stuck open
- Low likelihood: Carbon or debris buildup preventing free movement
Possible symptoms
- Check engine light on
- Power loss especially in mid-rpm range
- Possible rough idle or stalling
- Increased fuel consumption
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.