P25CCIntake Camshaft Actuator Park Lock Control Circuit High (Bank 1)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- With P25CC the controller sees the intake phaser lock control line on bank 1 sitting higher than expected, typically because it touches a live wire or the solenoid's ground path is shorted to supply. A protected output stage usually shuts down when it detects this, which leaves the lock solenoid without control: the pin falls back to whatever its spring dictates, and the intake phaser is then often parked at its locked base timing until the next restart. The GM 15OBDG01 table for the 2015 Volt and ELR counts P25CC among the intake phaser bundles that block further phaser diagnostics, but publishes no detection limits. Under CARB rules a circuit fault on such an output must be detected and stored. Inspect the harness near hot or moving parts first.
- What you may notice
- Check engine lamp on
- Sluggish response with intake timing fixed
- Likely causes
- LikelyLock control wire shorted to a supply voltage
- PossibleHarness insulation melted near the exhaust or turbo
- RareFaulty output stage 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 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.