OBD-II code · Powertrain (generic, extended)
P2B4A B Camshaft Position Actuator Position Sensor B Circuit High Bank 1
The position sensor B of the camshaft position actuator on the exhaust side of bank 1 reports a circuit high condition. Cam phasing position cannot be measured reliably.
Is it safe to drive with P2B4A?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySignal wire shorted to B+
- PossibleOpen position sensor
- 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
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Likely to fail
- Parts involved
- B Camshaft Position Actuator Pos Sensor B B1, Wiring Harness, Ecm
Related codes
- P2B42A Camshaft Position Actuator Position Sensor B Circuit High Bank 1
- P2B46A Camshaft Position Actuator Position Sensor B Circuit High Bank 2
- P2B4EB Camshaft Position Actuator Position Sensor B Circuit High Bank 2
- P34AFA Camshaft Position Actuator Position Sensor A Circuit High Bank 1
- P34B3A Camshaft Position Actuator Position Sensor A Circuit High Bank 2
- P34BFB Camshaft Position Actuator Position Sensor A Circuit High Bank 1
- P34C3B Camshaft Position Actuator Position Sensor A Circuit High Bank 2
- P2B47B Camshaft Position Actuator Position Sensor B Circuit Bank 1
- P2B48B Camshaft Position Actuator Position Sensor B Range/Performance Bank 1
- P2B49B Camshaft Position Actuator Position Sensor B Circuit Low Bank 1
- P2B4BB Camshaft Position Actuator Position Sensor B Circuit Bank 2
- P2B4CB Camshaft Position Actuator Position Sensor B Range/Performance Bank 2
- P2B4DB Camshaft Position Actuator Position Sensor B Circuit Low Bank 2
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.