P001A — 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.
General code reference. Confirm the definition and diagnostic procedure for your vehicle's year, model and engine. A stored code alone does not identify a failed part.
Affected components
- Cam profile actuator
- Actuator wiring
- Actuator connector
Possible causes to check
These are possible checks, not a ranked diagnosis. Follow the vehicle manufacturer's test procedure before replacing parts.
- Wiring break or unplugged connector
- Actuator coil open
- 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
Check each reference's vehicle and model-year scope. General background links do not establish which fault is most likely on your vehicle.
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.