P25E7
B Camshaft Position - Unable to Achieve Locked Position Bank 2
Camshaft phaser B on bank 2 cannot reach its base position at engine shutdown so the lock pin never engages. Next cold start may run rough until oil pressure builds.
- 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.
- Worn vanes or housing inside the phaserCommon
- Sludge or contaminated oil prevents return to basePossible
- Oil control valve leaks internallyPossible
Parts involved
- Cam Phaser B B2
- Park Lock Pin
- Oil Control Valve
P25E7 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.