OBD-II code · Powertrain (generic, extended)
P25D1 Exhaust Camshaft Actuator Park Lock Control Circuit Low Bank 1
The exhaust 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.
Is it safe to drive with P25D1?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyControl wire shorted to ground
- PossibleECU low-side driver internally shorted
- Less likelyConnector pins corroded - high contact resistance
Symptoms
- Check engine light on
- Power loss especially in mid-rpm range
- Possible rough idle or stalling
- Increased fuel consumption
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Usually unaffected
- Parts involved
- Exhaust Cam Phaser B1, Park Lock Solenoid, Wiring Harness
Related codes
- P25D4Exhaust Camshaft Actuator Park Lock Control Circuit Low Bank 2
- P25CEIntake Camshaft Actuator Park Lock Control Circuit Low Bank 2
- P25CFIntake Camshaft Actuator Park Lock Control Circuit High Bank 2
- P25D0Exhaust Camshaft Actuator Park Lock Control Circuit / Open Bank 1
- P25D2Exhaust Camshaft Actuator Park Lock Control Circuit High Bank 1
- P25D3Exhaust Camshaft Actuator Park Lock Control Circuit / Open Bank 2
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.