P0025
"B" Camshaft Position - Timing Over-Retarded (Bank 2)
The bank 2 exhaust camshaft remains retarded relative to commanded position. Same root causes as P0012 but on the exhaust cam.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
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.
- Oil control valve stuck (retard)Common
Parts involved
- Camshaft Position Actuator
- Oil Control Valve
- Cam Phaser
P0025 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.