P34C4
A Camshaft Position Actuator Control Circuit Driver Current/Temperature Too High Bank 1
The driver stage controlling the intake cam position actuator on bank 1 reports overcurrent or overtemperature, triggering thermal shutdown to protect the electronics.
- 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.
- Short circuit in actuator wiring or coilCommon
- Actuator mechanically seized, drawing high currentPossible
Parts involved
- Cam Actuator A Driver B1
- Cam Actuator A B1
P34C4 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.