P0E7ACoolant Bypass Valve A Control Stuck Closed
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P0E7A is the reverse of P0E79: valve A should open and let coolant pass, but the temperature picture says it has stayed shut. Depending on what the valve connects, the result is a loop that gets no flow from the engine side, so heater output or heat transfer drops, or a branch that heats up because it is cut off from circulation. No manufacturer documents P0E7A publicly. The closest published case is the sibling on valve B: Stellantis sets P0E80 once the engine coolant reading and the electric heater inlet are over 40 °F apart, and blames misrouted hoses or a clogged three-way valve on Wrangler and Pacifica plug-in hybrids. Under CARB, actuators of this kind need a functional check as well. Electrical faults on valve A are P0E75 to P0E78.
- What you may notice
- Little or no cabin heat
- Rising coolant temperature in the affected loop
- Check engine light
- Likely causes
- LikelyDebris or deposits blocking valve A
- PossibleActuator or gear stuck in the closed position
- RareAir pocket after a coolant service blocking flow
- 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.