P25CB
Intake Camshaft Actuator Park Lock Control Circuit Low Bank 1
The intake camshaft park-lock control line on bank 1 is below the expected voltage window. Usually a short to ground or a low-side driver shorted internally.
- Check engine light: Yes
- Emissions related: No
- 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.
- Control wire shorted to groundCommon
- ECU low-side driver internally shortedPossible
- Connector pins corroded - high contact resistanceLess likely
Parts involved
- Intake Cam Phaser B1
- Park Lock Solenoid
- Wiring Harness
P25CB 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.