P25E3 code meaning
"B" Camshaft Position - Stuck In Locked Position (Bank 1)
Powertrain system Generic code P25xx codes Check engine light
What P25E3 means
P25E3 concerns the exhaust side: the bank 1 exhaust phaser, camshaft B, remains held by its lock pin when the controller wants to move it. Exhaust timing then stays at its parking angle, which limits how the module can use valve overlap for internal exhaust gas recirculation and scavenging. The Boss 302S OBD-II list Ford published in 2014 marks P25E3 with the warning lamp, alongside the bank 2 exhaust code P25E6. BorgWarner's Gamma II system shows that exhaust phasers can use the same torsional-assist hardware as the intake side, although there only the intake phaser carries the mid-position lock. A pin that stays engaged mostly indicates low or contaminated oil at the phaser, a sticking control valve or a damaged rotor. CARB requires VVT target errors to be detected. The engine may idle roughly, emit more NOx and lose some power.
P25E3 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor0.5 to 6 hours
- Clears after repairAfter a drive cycle
Symptoms of P25E3
- Check engine lamp on
- Rough idle
- Slight loss of power, possibly failed emissions test
Common causes of P25E3
- Most likelyLow or contaminated oil at the exhaust phaser
- PossibleBank 1 exhaust oil control valve sticking
- Less likelyDamaged rotor or lock pin inside the exhaust phaser
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Cam phaser b b1Park lock pinOil control valve
What each part of P25E3 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. |
| E3 | The exact fault in that area. |
What to do next
- Note P25E3 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 P25E3
What does P25E3 mean?
P25E3 means ""B" Camshaft Position - Stuck In Locked Position (Bank 1)". P25E3 concerns the exhaust side: the bank 1 exhaust phaser, camshaft B, remains held by its lock pin when the controller wants to move it. It is a generic code, so it means the same on every make.
Is it safe to drive with P25E3?
Drive gently and only to a workshop. With P25E3 the car can go into limp mode (reduced power) to protect itself.
Will P25E3 fail an emissions test?
Yes, it can. P25E3 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 P25E3 to fix?
Difficulty: hard. A typical repair takes 0.5 to 6 hours of work. This is a job for a workshop.
Will P25E3 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.