Powertrain, generic

P0E15 Hybrid/EV Battery Pack Coolant Heater A Control Performance

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

P0E15 means heater A can be addressed electrically but does not deliver the heat it was asked for. Stellantis uses the code on Chrysler Pacifica plug-in hybrids from 2017 onward and the 2021–2023 Jeep Wrangler 4xe for the high-voltage electric coolant heater (ECH), a LIN-controlled unit that on these models heats the cabin loop. The ECH locks itself after low or high voltage, lost communication or overheating; repeated overheating locks it until service or, on the Wrangler after the third event, for good, and P0E15 must be present for the reset routine. Causes named are coolant leaks, air, frozen or wrong coolant, a faulty auxiliary pump, supply problems or the heater itself. Several bulletins (08-052-22, 08-080-26) cure false or permanent P0E15 entries with HCP/AHCP software. The MIL comes on and EV mode may be lost.

Likely causes

Low coolant, leaks or trapped air in the heater loop
Hybrid control software that needs an update (Stellantis HCP/AHCP)
Heater unit permanently locked or internally failed
Faulty auxiliary coolant pump or restricted hoses
High- or low-voltage supply fault or LIN bus problem at the heater

Symptoms

  • Check engine light on
  • Message that electric mode is unavailable, engine keeps running
  • Little or no heat from the electric heater
  • Permanent code may block an emissions inspection

Repair estimate

DifficultyHardWorkshop job
Parts and labour€100–2,000
Time0.5–4 h

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

Parts involved

hv battery pack coolant heater awiring harnessbms

Related codes

P0E12P0E13P0E14P0E19P0C4A

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