Powertrain
generic or reserved
P34B5
B Camshaft Position Actuator Temperature Sensor Range/Performance Bank 1
Temperature sensor of exhaust cam actuator on bank 1 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.
SystemPowertrain
Typegeneric or reserved
GroupP3
Range / number4 / B5
Possible causes
- Sensor reading drifted high
- Sensor element aged beyond calibration window low
- Sensor mounting loose - signal damping low
Symptoms
- Check engine light on
- Power loss especially in mid-rpm range
- Possible rough idle or stalling
- Increased fuel consumption
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 200–1500 €
- Estimated time: 1.5–6 h
- Component: cam actuator b temp sensor b1
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012