Powertrain, generic (extended)

P25D5 Exhaust Camshaft Actuator Park Lock Control Circuit High (Bank 2)

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P25D5 closes this series: the bank 2 exhaust phaser's lock control signal sits above its allowed voltage, pointing to a short to battery or ignition voltage, a return path tied to supply, or a defective output in the module. The protected driver then stops switching, and the lock solenoid stays without command until the next key cycle or until the fault vanishes. If P25D5 shows up together with high codes on other actuators, a shared harness fault or a module problem is more likely than a bad solenoid. There is no public manufacturer documentation for P25D5; the description draws on CARB's monitoring rules for variable valve timing and output components and on the design of locking phasers. Driveability suffers only mildly, but emissions and fuel use rise.

Likely causes

Bank 2 exhaust lock wire shorted to battery or ignition voltage
Harness fault affecting several actuator lines
Defective output in the engine control module

Symptoms

  • Check engine lamp on
  • Slightly higher fuel consumption

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€80–900
Time0.5–3.5 h

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

Parts involved

exhaust cam phaser b2park lock solenoidwiring harness

Related codes

P25D2P25D3P25D4P25CFP2095

References: law.cornell.edu, en.wikipedia.org.