P25D4Exhaust Camshaft Actuator Park Lock Control Circuit Low (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
- P25D4 reports a lock control line for the bank 2 exhaust phaser that is pulled down below its expected level. Grounding through damaged insulation, a solenoid with shorted turns or oil that has crept into the connector are the usual explanations. Because the exhaust manifold of the second bank radiates onto nearby harness sections, heat sleeving that has slipped out of place is worth checking. While the fault is active the controller cannot set the lock reliably and normally freezes exhaust timing on that bank. As with the other exhaust lock codes, there is no public manufacturer documentation; the account rests on CARB's circuit monitoring requirement and the operating principle of locking phasers. Repair is wiring work or a new solenoid.
- What you may notice
- Check engine lamp on
- Bank 2 exhaust timing fixed
- Likely causes
- LikelyHeat sleeve slipped, wire grounded at the manifold
- PossibleShorted turns in the bank 2 exhaust lock solenoid
- RareOil in the connector
- 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.