P0E80 code meaning
Coolant Bypass Valve B Control Stuck Closed
Powertrain system Generic code P0Exx codes Check engine light
What P0E80 means
P0E80 reports that bypass valve B has stayed shut although flow through it is requested. Stellantis gives the criterion for the Jeep Wrangler plug-in hybrid (2021 to 2023): the code sets once engine coolant and the inlet of the electric coolant heater differ by more than 40 °F, about 22 K. Its service case S2208000205 and bulletin 07-006-23 (cars built on 4 June 2022) trace this to hoses on the three-way valve that were fitted one port off; drivers notice a lit check engine light and at times no heat, and the fix is rerouting the hoses using the marks on the valve. On the 2022 to 2023 Pacifica plug-in hybrid, bulletin 07-008-23 blames a valve clogged by machining debris and replaces it. CARB covers such outputs under functional monitoring. P0E7F is the open counterpart.
P0E80 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor1 to 2 hours
- Clears after repairAfter a drive cycle
Symptoms of P0E80
- Check engine light
- Intermittent loss of cabin heat
- Electric mode may be disabled
Common causes of P0E80
- Most likelyHoses at the three-way valve shifted by one port (Wrangler 4xe, bulletin 07-006-23)
- PossibleValve blocked by machining debris (Pacifica Hybrid, bulletin 07-008-23)
- Less likelyValve B actuator seized in the closed position
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Coolant bypass valve bCooling system
What each part of P0E80 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 80 | The exact fault in that area. |
What to do next
- Note P0E80 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 P0E80
What does P0E80 mean?
P0E80 means "Coolant Bypass Valve B Control Stuck Closed". P0E80 reports that bypass valve B has stayed shut although flow through it is requested. It is a generic code, so it means the same on every make.
Is it safe to drive with P0E80?
Drive gently and only to a workshop. With P0E80 the car can go into limp mode (reduced power) to protect itself.
Will P0E80 fail an emissions test?
Yes, it can. P0E80 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 P0E80 to fix?
Difficulty: medium. A typical repair takes 1 to 2 hours of work. This is a job for a workshop.
Will P0E80 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.