OBD-II code · Powertrain (manufacturer / generic)
P34BB B Camshaft Position Actuator Temperature Sensor Circuit High Bank 2
Cam actuator B temperature sensor on bank 2 signal voltage above expected range. 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 P34BB?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySignal wire open
- Less likelyConnector pins corroded - high contact resistance
- Less likelySupply wire pinched against B+ source
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
- 0.5–3 h
- Emissions test
- Likely to fail
- Parts involved
- Cam Actuator B Temp Sensor B2, Sensor Wiring
Related codes
- P34A7A Camshaft Position Actuator Temperature Sensor Circuit High Bank 1
- P34ABA Camshaft Position Actuator Temperature Sensor Circuit High Bank 2
- P34B7B Camshaft Position Actuator Temperature Sensor Circuit High Bank 1
- P34B8B Camshaft Position Actuator Temperature Sensor Circuit Bank 2
- P34B9B Camshaft Position Actuator Temperature Sensor Range/Performance Bank 2
- P34BAB Camshaft Position Actuator Temperature Sensor Circuit Low Bank 2
- P34BCB Camshaft Position Actuator Position Sensor A Circuit Bank 1
- P34BDB Camshaft Position Actuator Position Sensor A Range/Performance Bank 1
- P34BEB Camshaft Position Actuator Position Sensor A Circuit Low Bank 1
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.