What does code P34B4 mean?

DTC codes / P34xx · Auxiliary emission controls / P34B4

P34B4B Camshaft Position Actuator Temperature Sensor Circuit Bank 1

P34B4 indicates that the powertrain control module (PCM) has detected an abnormal signal from the camshaft position actuator temperature sensor on bank 1, which is the side of the engine containing cylinder number one. The PCM compares the sensor's voltage or resistance against expected values and sets this code when the signal falls outside the valid range or is intermittent.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaAuxiliary emission controls

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.