P34AC
A Camshaft Position Actuator Position Sensor A Circuit Bank 1
Generic electrical fault on the position sensor of the intake camshaft actuator on bank 1 (closed-loop feedback for VVT angle).
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: hard
Symptoms
- Check engine light on
- Power loss especially in mid-rpm range
- Possible rough idle or stalling
- Increased fuel consumption
Common causes
Ordered by how often each turns out to be the cause.
- Position sensor failedCommon
Parts involved
- Cam Actuator A Pos Sensor B1
- Sensor Wiring
P34AC is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.