P25E4"B" Camshaft Position - Unable to Achieve Locked Position (Bank 1)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P25E4 means the bank 1 exhaust phaser does not reach and engage its locking position when the controller asks for it, for example before shutdown or an automatic engine stop. Stellantis lists P25E4 in several PCM reflash bulletins for Wagoneer and Grand Wagoneer models with the 3.0-litre Hurricane high-output twin-turbo inline six and stop-start, among them 18-022-25 Rev. A for 2025 and 18-040-26 for 2022; the remedy there is new software, and the listed complaints include no restart after a stop-start event. An inline six only has bank 1, so the bank 2 code P25E7 does not apply there. Outside such software cases, low oil pressure at hot idle, debris in the phaser or a sticking control valve keep the pin from dropping in. CARB lists a pin that fails to move into place as a fault the VVT monitor must find.
- What you may notice
- Check engine lamp on
- Engine fails to restart after an automatic stop, restarts after an ignition cycle
- Rough start
- Likely causes
- LikelyEngine control software needing an update (documented for Stellantis Hurricane engines)
- PossibleLow oil pressure at hot idle so the phaser cannot swing into the lock
- PossibleDebris in the exhaust phaser or a sticking control valve
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.