P25E7 code meaning
"B" Camshaft Position - Unable to Achieve Locked Position (Bank 2)
Powertrain system Generic code P25xx codes Check engine light
What P25E7 means
With P25E7 the module reports that the bank 2 exhaust phaser could not be brought into its locking position: when the lock is requested, the cam angle does not settle at the parking value or the pin does not hold it there. A start without the pin engaged tends to be rough, and on stop-start engines a smooth restart becomes less certain. No manufacturer documents P25E7 publicly; the closest documented case is P25E4 on bank 1 of Stellantis' Hurricane six, which was resolved by PCM software. Mechanically, mid-lock designs such as BorgWarner's need the rotor to swing past the slot on oil-driven cam torque, so degraded oil, a stuck spool valve or wear in the pin and its bore are usual causes. CARB treats a pin that does not move into position as a VVT fault the OBD system must detect.
P25E7 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor0.5 to 7 hours
- Clears after repairAfter a drive cycle
Symptoms of P25E7
- Check engine lamp on
- Rough or rattling start
- Hesitant restart after an automatic engine stop
Common causes of P25E7
- Most likelyAged or sludged oil slowing the bank 2 exhaust phaser
- PossibleSpool of the bank 2 exhaust control valve hanging
- PossibleWorn lock pin or pin bore so the pin no longer holds
- Less likelyCalibration issue fixed by a control unit update
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Cam phaser b b2Park lock pinOil control valve
What each part of P25E7 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. |
| E7 | The exact fault in that area. |
What to do next
- Note P25E7 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 P25E7
What does P25E7 mean?
P25E7 means ""B" Camshaft Position - Unable to Achieve Locked Position (Bank 2)". With P25E7 the module reports that the bank 2 exhaust phaser could not be brought into its locking position: when the lock is requested, the cam angle does not settle at the parking value or the pin does not hold it there. It is a generic code, so it means the same on every make.
Is it safe to drive with P25E7?
Drive gently and only to a workshop. With P25E7 the car can go into limp mode (reduced power) to protect itself.
Will P25E7 fail an emissions test?
Yes, it can. P25E7 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 P25E7 to fix?
Difficulty: hard. A typical repair takes 0.5 to 7 hours of work. This is a job for a workshop.
Will P25E7 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.