P0E1EHybrid/EV Battery Pack Coolant Pump B Control Circuit Driver Current/Temperature Too High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0E1E does not describe the wire or the pump directly but the switching stage that drives pump B: that driver has reported excess current or overheating and has protected itself. Such smart switches measure their own state; a TI automotive high-side switch, for example, turns off at about 150 °C junction temperature or on reaching its current limit and signals the fault on a diagnostic pin. No manufacturer documents P0E1E publicly. GM's 2019 tables show a comparable monitor for a different load, the fuel pump driver code P1255: a board temperature of 160 °C or more, 3 failures in 15 samples, Type B. A pump that drags or seizes, a partial short in the motor or a hot mounting spot of the module are typical. Pump A has the same code as P0E1F.
- What you may notice
- Check engine light on
- Pump B switches off intermittently
- Battery or electronics temperature rises, power is limited
- Likely causes
- LikelyPump B binding or seized, drawing too much current
- PossiblePartial short in the pump motor or its wiring
- PossibleDriver in the module overheating due to location or poor cooling
- RareDegraded output driver in the control module
- 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 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.