OBD-II code · Powertrain (manufacturer / generic)
P34BC B Camshaft Position Actuator Position Sensor A Circuit Bank 1
Generic electrical fault on the position sensor of the exhaust cam actuator on bank 1. The camshaft position sensor identifies which cylinder is on the compression stroke — without it the ECM cannot run sequential injection or coil-on-plug ignition correctly.
Is it safe to drive with P34BC?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyPosition sensor failed
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
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1.5–6 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Cam Actuator B Pos Sensor B1, Sensor Wiring
Related codes
- P2B3FA Camshaft Position Actuator Position Sensor B Circuit Bank 1
- P2B43A Camshaft Position Actuator Position Sensor B Circuit Bank 2
- P2B47B Camshaft Position Actuator Position Sensor B Circuit Bank 1
- P2B4BB Camshaft Position Actuator Position Sensor B Circuit Bank 2
- P34ACA Camshaft Position Actuator Position Sensor A Circuit Bank 1
- P34B0A Camshaft Position Actuator Position Sensor A Circuit Bank 2
- P34C0B Camshaft Position Actuator Position Sensor A Circuit Bank 2
- P34B9B Camshaft Position Actuator Temperature Sensor Range/Performance Bank 2
- P34BAB Camshaft Position Actuator Temperature Sensor Circuit Low Bank 2
- P34BBB Camshaft Position Actuator Temperature Sensor Circuit High Bank 2
- P34BDB Camshaft Position Actuator Position Sensor A Range/Performance Bank 1
- P34BEB Camshaft Position Actuator Position Sensor A Circuit Low Bank 1
- P34BFB Camshaft Position Actuator Position Sensor A Circuit High Bank 1
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.