OBD-II code · Powertrain (generic, extended)
P25DE A Camshaft Position - Unable to Achieve Locked Position Bank 1
Camshaft phaser A on bank 1 cannot reach its base position at engine shutdown so the lock pin never engages. Next cold start may run rough until oil pressure builds.
Is it safe to drive with P25DE?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyWorn vanes or housing inside the phaser
- PossibleSludge or contaminated oil prevents return to base
- PossibleOil control valve leaks internally
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
- 1.5–5 h
- Emissions test
- Usually unaffected
- Parts involved
- Cam Phaser A B1, Park Lock Pin, Oil Control Valve
Related codes
- P25E1A Camshaft Position - Unable to Achieve Locked Position Bank 2
- P25E4B Camshaft Position - Unable to Achieve Locked Position Bank 1
- P25E7B Camshaft Position - Unable to Achieve Locked Position Bank 2
- P25DBFuel Level Sensor C Circuit Intermittent
- P25DCFuel Level Sensor C Stuck
- P25DDA Camshaft Position - Stuck In Locked Position Bank 1
- P25DFA Camshaft Position Control Performance Bank 1
- P25E0A Camshaft Position - Stuck In Locked Position Bank 2
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.