OBD-II code · Powertrain (generic)
P001B A Camshaft Profile Actuator A Control Circuit Low Bank 1
Low control voltage at the cam profile actuator (intake, profile A, bank 1). Typically a short to ground in the wiring or actuator coil.
Is it safe to drive with P001B?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyWiring shorted to ground
- PossibleActuator coil shorted internally
- Less likelyConnector pins corroded - high contact resistance
Symptoms
- Check engine light on
- Power loss especially in mid-rpm range
- Possible rough idle or stalling
- Increased fuel consumption
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–4 h
- Emissions test
- Likely to fail
- Parts involved
- Cam Profile Actuator, Actuator Wiring
Related codes
- P001EA Camshaft Profile Actuator A Control Circuit Low Bank 2
- P002BB Camshaft Profile Actuator A Control Circuit Low Bank 1
- P002EB Camshaft Profile Actuator A Control Circuit Low Bank 2
- P2B34A Camshaft Profile Actuator B Control Circuit Low Bank 1
- P2B37A Camshaft Profile Actuator B Control Circuit Low Bank 2
- P2B3AB Camshaft Profile Actuator B Control Circuit Low Bank 1
- P2B3DB Camshaft Profile Actuator B Control Circuit Low Bank 2
- P0018Crankshaft Position - Camshaft Position Correlation (Bank 2 Sensor A)
- P0019Crankshaft Position - Camshaft Position Correlation (Bank 2 Sensor B)
- P001AA Camshaft Profile Actuator A Control Circuit/Open Bank 1
- P001CA Camshaft Profile Actuator A Control Circuit High Bank 1
- P001DA Camshaft Profile Actuator A Control Circuit/Open Bank 2
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.