What does code P34AF mean?

DTC codes / P34xx · Auxiliary emission controls / P34AF

P34AFA Camshaft Position Actuator Position Sensor A Circuit High Bank 1

P34AF indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the signal circuit for the Bank 1 camshaft position actuator position sensor, labeled 'A'. This sensor reports the actual position of the camshaft phaser, and a high voltage typically means the signal wire is shorted to power, the sensor's internal circuit has failed, or the ground reference is compromised.

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.