Powertrain, generic

P0E1E Hybrid/EV Battery Pack Coolant Pump B Control Circuit Driver Current/Temperature Too High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

Pump B binding or seized, drawing too much current
Partial short in the pump motor or its wiring
Driver in the module overheating due to location or poor cooling
Degraded output driver in the control module

Symptoms

  • Check engine light on
  • Pump B switches off intermittently
  • Battery or electronics temperature rises, power is limited

Repair estimate

DifficultyHardWorkshop job
Parts and labour€100–1,200
Time1–3 h

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

Parts involved

hv battery pack coolant pump bbms

Related codes

P0E1FP0E1AP0E1BP0E1CP2CF5

References: ti.com, gsi.ext.gm.com, law.cornell.edu.