OBD-II code · Powertrain (manufacturer / generic)
P34C1 B Camshaft Position Actuator Position Sensor A Range/Performance Bank 2
Position sensor of exhaust cam actuator on bank 2 reads implausibly. 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 P34C1?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelySensor reading drifted
- Less likelySensor element aged beyond calibration window
- Less likelySensor mounting loose - signal damping
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 B2
Related codes
- P2B40A Camshaft Position Actuator Position Sensor B Range/Performance Bank 1
- 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
- P34BEB Camshaft Position Actuator Position Sensor A Circuit Low Bank 1
- P34BFB Camshaft Position Actuator Position Sensor A Circuit High Bank 1
- P34C0B Camshaft Position Actuator Position Sensor A Circuit Bank 2
- P34C2B Camshaft Position Actuator Position Sensor A Circuit Low Bank 2
- P34C3B Camshaft Position Actuator Position Sensor A Circuit High Bank 2
- P34C4A Camshaft Position Actuator Control Circuit Driver Current/Temperature Too High Bank 1
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.