P25D2 code meaning
Exhaust Camshaft Actuator Park Lock Control Circuit High (Bank 1)
Powertrain system Generic code P25xx codes Check engine light
What P25D2 means
P25D2 is set when the bank 1 exhaust phaser lock control line carries more voltage than the controller allows in the current switching state, for example because it is shorted to an ignition-fed wire or the solenoid's return is tied to supply. Most output stages detect overcurrent here and switch off, so the lock solenoid loses its command and the pin goes to the position its spring defines. The engine then runs with a fixed exhaust cam until the fault clears. No manufacturer publishes material for P25D2; the explanation uses the J2012 title, CARB's demand for electrical monitoring of output components in variable valve timing systems, and the working principle of locking phasers. Unlike the Low code, a short to power can also damage the driver.
P25D2 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 P25D2
- Check engine lamp on
- Weaker mid-range pull
Common causes of P25D2
- Most likelyLock control wire shorted to an ignition-fed circuit
- PossibleSolenoid return path shorted to supply
- Less likelyDamaged 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
Exhaust cam phaser b1Park lock solenoidWiring harness
What each part of P25D2 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. |
| D2 | The exact fault in that area. |
What to do next
- Note P25D2 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 P25D2
What does P25D2 mean?
P25D2 means "Exhaust Camshaft Actuator Park Lock Control Circuit High (Bank 1)". P25D2 is set when the bank 1 exhaust phaser lock control line carries more voltage than the controller allows in the current switching state, for example because it is shorted to an ignition-fed wire or the solenoid's return is tied to supply. It is a generic code, so it means the same on every make.
Is it safe to drive with P25D2?
Drive gently and only to a workshop. With P25D2 the car can go into limp mode (reduced power) to protect itself.
Will P25D2 fail an emissions test?
Yes, it can. P25D2 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 P25D2 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P25D2 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.