P0AE7

Hybrid/EV Battery Precharge Contactor A Control Circuit High

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine light comes on
Hybrid/electric system power reduction
Problems starting the car
The car goes into emergency mode
Unstable operation of the hybrid system

Causes

Precharge contactor fault
Damage to the control circuit wiring harness
Short circuit in control circuit
Battery management module (BMS) malfunction
Circuit Grounding Problems

How to Fix

Check the integrity of the control circuit wiring harness
Check the resistance of the precharge contactor
Check control circuit voltage
Replace precharge contactor if necessary
Check and update BMS software

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