OBD-II code · Powertrain (generic, extended)
P2B40 A Camshaft Position Actuator Position Sensor B Range/Performance Bank 1
The position sensor B of the camshaft position actuator on the intake side of bank 1 reports a range/performance condition. Cam phasing position cannot be measured reliably.
Is it safe to drive with P2B40?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySensor offset drifted
- PossibleActuator mechanism worn
- Less likelySensor element aged beyond calibration window
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
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Likely to fail
- Parts involved
- A Camshaft Position Actuator Pos Sensor B B1, Wiring Harness, Ecm
Related codes
- P2B44A Camshaft Position Actuator Position Sensor B Range/Performance Bank 2
- P2B48B Camshaft Position Actuator Position Sensor B Range/Performance Bank 1
- P2B4CB Camshaft Position Actuator Position Sensor B Range/Performance Bank 2
- P34ADA Camshaft Position Actuator Position Sensor A Range/Performance Bank 1
- P34B1A Camshaft Position Actuator Position Sensor A Range/Performance Bank 2
- P34BDB Camshaft Position Actuator Position Sensor A Range/Performance Bank 1
- P34C1B Camshaft Position Actuator Position Sensor A Range/Performance Bank 2
- P2B3DB Camshaft Profile Actuator B Control Circuit Low Bank 2
- P2B3EB Camshaft Profile Actuator B Control Circuit High Bank 2
- P2B3FA Camshaft Position Actuator Position Sensor B Circuit Bank 1
- P2B41A Camshaft Position Actuator Position Sensor B Circuit Low Bank 1
- P2B42A Camshaft Position Actuator Position Sensor B Circuit High Bank 1
- P2B43A Camshaft Position Actuator Position Sensor B Circuit Bank 2
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.