What are the common causes of P0AE2?

A precharge contactor welded or stuck closed. Corrosion or buildup on the precharge contactor. A short in the precharge wiring. A faulty battery management system. Incorrect battery installation.

Check the precharge contactor for welded contacts. Command the precharge contactor open with a scan tool. Inspect the precharge circuit and wiring for corrosion, damage or a short. Verify the battery pack installation. Replace the precharge contactor if it stays closed. Clear the code and retest.

P0AE2

Hybrid/EV Battery Precharge Contactor Circuit Stuck Closed

System: Powertrain control (P code)
Lamp: Check Engine Light
Category: Powertrain - Hybrid Propulsion

What it means

P0AE2 means Hybrid/EV Battery Precharge Contactor Circuit Stuck Closed.

Check these first

A precharge contactor welded or stuck closed
Corrosion or buildup on the precharge contactor
A short in the precharge wiring
A faulty battery management system
Incorrect battery installation

What to do next

Check the precharge contactor for welded contacts
Command the precharge contactor open with a scan tool
Inspect the precharge circuit and wiring for corrosion, damage or a short
Verify the battery pack installation
Replace the precharge contactor if it stays closed
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.