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

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.

High severity. Can I keep driving?If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.

Symptoms

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

Most 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

What to check, in order

Start with the simplest. You can tick off each step.

Read the codes with a hybrid-compatible scanner and write down the freeze frame data
Check the sensor's ground and make sure the signal wire is not receiving voltage from another circuit.
Make sure the battery cooling air intake is clean
Check the 12 V auxiliary battery, which can also trigger warnings
Leave any high-voltage measurements to a specialized repair shop

Good to know

Repair difficulty: hard
It can trigger limp mode.
It affects emissions.

What each character of P0E1E means

P: Powertrain: engine and transmission
0: Generic code: same on every make
E: Subsystem depends on the code range
1E: Specific fault in that system

Frequently asked questions

Can I keep driving with code P0E1E?

If the car still runs, drive as little as possible and go to a specialized repair shop. Do not touch the orange cables: they carry high voltage.

What causes code P0E1E?

The most common causes are: 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.

Related codes

Sources

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.