P0E7FCoolant Bypass Valve B Control Stuck/Open
- 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
- P0E7F means coolant bypass valve B is judged to stay open while the module wants it closed. Stellantis documents it on the Chrysler Pacifica plug-in hybrid with the 3.6 litre engine: bulletin 07-008-23 (June 2023) covers cars built from 3 November 2022 to 10 February 2023, where machining debris from the cylinder head water jackets can collect inside the three-way valve. The MIL comes on and electric driving may be locked out while the petrol engine still works. To reproduce it, the bulletin has the car idle 10 minutes in engine mode, then run 5 minutes on battery with heat on and the blower below half; if P0E7F or P0E80 appears, the valve is replaced. The Hurricane software bulletins also list the code. P0E80 is the stuck closed case; P0E79 is the same fault on valve A.
- What you may notice
- MIL on
- Electric drive mode unavailable, engine runs instead
- Reduced or unstable cabin heat
- Likely causes
- LikelyMachining debris lodged in the three-way coolant valve (Pacifica Hybrid, bulletin 07-008-23)
- PossibleWorn or broken internals in valve B
- RareCalibration issue addressed by an engine control update (3.0 Hurricane)
- 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: €150 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.