Powertrain, generic

P0E80 Coolant Bypass Valve B Control Stuck Closed

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

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.

Likely causes

Hoses at the three-way valve shifted by one port (Wrangler 4xe, bulletin 07-006-23)
Valve blocked by machining debris (Pacifica Hybrid, bulletin 07-008-23)
Valve B actuator seized in the closed position

Symptoms

  • Check engine light
  • Intermittent loss of cabin heat
  • Electric mode may be disabled

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€100–700
Time1–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

coolant bypass valve bcooling system

Related codes

P0E7FP0E7EP0E7AU063C

References: static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov.