P34AF: A Camshaft Position Actuator Position Sensor A Circuit High Bank 1
Standardized SAE J2012 code · P34xx codes
What does P34AF mean?
Cam actuator A position sensor on bank 1 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.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Symptoms
- Check engine light on
- Power loss especially in mid-rpm range
- Possible rough idle or stalling
- Increased fuel consumption
Common causes
- High Signal wire open
- Low Connector pins corroded - high contact resistance
- Low Supply wire pinched against B+ source
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P34AF on the same make and model first.
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Describe your P34AF problemRelated codes
- P2B42 A Camshaft Position Actuator Position Sensor B Circuit High Bank 1
- P2B46 A Camshaft Position Actuator Position Sensor B Circuit High Bank 2
- P2B4A B Camshaft Position Actuator Position Sensor B Circuit High Bank 1
- P2B4E B Camshaft Position Actuator Position Sensor B Circuit High Bank 2
- P34B3 A Camshaft Position Actuator Position Sensor A Circuit High Bank 2
- P34BF B Camshaft Position Actuator Position Sensor A Circuit High Bank 1
- P34C3 B Camshaft Position Actuator Position Sensor A Circuit High Bank 2