P0E15Hybrid/EV Battery Pack Coolant Heater A Control Performance
- 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
- 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.
- What you may notice
- 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
- Likely causes
- LikelyLow coolant, leaks or trapped air in the heater loop
- LikelyHybrid control software that needs an update (Stellantis HCP/AHCP)
- PossibleHeater unit permanently locked or internally failed
- PossibleFaulty auxiliary coolant pump or restricted hoses
- RareHigh- or low-voltage supply fault or LIN bus problem at the heater
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €2,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.