Powertrain, generic (extended)

P25CE Intake Camshaft Actuator Park Lock Control Circuit Low (Bank 2)

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P25CE stands for a low signal on the lock control line of the bank 2 intake phaser: the wire or the solenoid winding has found a path to ground, or the module's output is stuck pulling low. Because the second bank's harness often runs along the back of the engine or under the intake manifold, chafing at brackets and heat damage are frequent findings. A grounded line may hold the lock solenoid energised permanently, leaving the pin withdrawn when the engine is shut down, which can cause a clatter on the next cold start. GM's 15OBDG01 table includes P25CE in the intake phaser fault groups that disable the other phaser monitors, without its own limits. Codes for both banks at once suggest a shared supply or low battery voltage rather than two bad solenoids.

Likely causes

Bank 2 harness chafed through at a bracket
Shorted winding in the bank 2 lock solenoid
Low system voltage setting lock codes on both banks

Symptoms

  • Check engine lamp on
  • Clatter at cold start

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€80–800
Time0.5–3.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

intake cam phaser b2park lock solenoidwiring harness

Related codes

P25CBP25CDP25CFP25D4P2092

References: gsi.ext.gm.com, law.cornell.edu.