P25D3Exhaust Camshaft Actuator Park Lock Control Circuit/Open (Bank 2)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P25D3 concerns engines with two cylinder banks and a lockable exhaust phaser on each: the lock solenoid circuit of the bank 2 exhaust phaser is open or electrically implausible, so the module loses control over its pin. On many V engines the bank 2 exhaust solenoid sits at the rear or close to the firewall, where connectors are easily left loose after timing work. A loose plug sets only this code, whereas an open in a shared supply would usually trigger lock codes on several phasers at once. No manufacturer documents P25D3 in public material; the text is based on CARB's variable valve timing and output monitoring rules and on how locking phasers operate. The engine keeps running, but with fixed exhaust timing on bank 2.
- What you may notice
- Check engine lamp on
- Uneven running between the banks
- Likely causes
- LikelyBank 2 exhaust lock connector left loose after timing work
- PossibleOpen winding in the bank 2 exhaust lock solenoid
- RareOpen in a supply shared with other phaser solenoids
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.