A Camshaft Profile Actuator A Control Circuit/Open Bank 1
Open circuit at the camshaft profile actuator (intake, profile A, bank 1). Used by systems with discrete cam-lift levels (e.g. BMW Valvetronic, Honda VTEC, Audi AVS) — the actuator that selects the lift profile cannot be driven.
Affected components
- Cam profile actuator
- Actuator wiring
- Actuator connector
Common causes
- High likelihood: Wiring break or unplugged connector
- Medium likelihood: Actuator coil open
- Low likelihood: Pin pushed back out of connector body
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
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.