P25CC code meaning
Intake Camshaft Actuator Park Lock Control Circuit High (Bank 1)
Powertrain system Generic code P25xx codes Check engine light
What P25CC means
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.
P25CC at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P25CC
- Check engine lamp on
- Sluggish response with intake timing fixed
Common causes of P25CC
- Most likelyLock control wire shorted to a supply voltage
- PossibleHarness insulation melted near the exhaust or turbo
- Less likelyFaulty output stage in the engine control module
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Intake cam phaser b1Park lock solenoidWiring harness
What each part of P25CC means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 5 | Area: vehicle speed, idle control and auxiliary inputs. |
| CC | The exact fault in that area. |
What to do next
- Note P25CC and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P25CC
What does P25CC mean?
P25CC means "Intake Camshaft Actuator Park Lock Control Circuit High (Bank 1)". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P25CC?
Drive gently and only to a workshop. With P25CC the car can go into limp mode (reduced power) to protect itself.
Will P25CC fail an emissions test?
Yes, it can. P25CC is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P25CC to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P25CC clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.