P0AA2

Hybrid/EV Battery Positive Contactor Circuit Stuck Open

Severity

🚨 Critical

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–278 (est.)

Symptoms

Vehicle does not switch to READY mode
Lack of traction when pressing the gas pedal
Check engine light comes on
Warning messages appearing about a malfunction of the hybrid system
Reduced power or complete loss of power

Causes

Battery positive contactor fault
Open or short circuit in the contactor control circuit
Problems with power or grounding of the contactor circuit
Malfunction of the hybrid control module (HCM)
Corrosion or poor contact in connectors

How to Fix

Check the condition of the battery contactor
Check the integrity of the contactor control circuit
Check fuses and relays associated with the system
Scan the hybrid system control module for additional errors
Repair only from an authorized dealer

Related codes

P0AA1 P0AA3 P0AA4