P25CFIntake Camshaft Actuator Park Lock Control Circuit High (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
- P25CF is logged when the bank 2 intake phaser lock control line stays above its permitted voltage band. Common reasons are contact with a powered wire, moisture bridging connector pins to a supply terminal, or a failed output transistor in the controller. Once the driver protects itself and stops switching, the second bank's lock can no longer be released, so its intake cam may stay at the base timing while bank 1 still adjusts; the resulting imbalance shows up as a lumpy idle. In GM's 15OBDG01 table P25CF closes the list of intake phaser lock codes in the fault bundles that suspend the other phaser tests; no threshold is published. Before replacing the controller, measure the line with the solenoid unplugged.
- What you may notice
- Check engine lamp on
- Lumpy idle from uneven bank timing
- Likely causes
- LikelyBank 2 lock control wire touching a powered circuit
- PossibleMoisture in the connector bridging to a supply pin
- RareFailed output transistor in the engine control module
- 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.