P0AA2
Hybrid/EV Battery Positive Contactor Circuit Stuck Open
P0AA2 is an OBD-II diagnostic trouble code meaning: Hybrid/EV Battery Positive Contactor Circuit Stuck Open. Common causes: battery positive contactor fault, open or short circuit in the contactor control circuit. Estimated repair cost: $56–278.
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
Error P0AA2 by Vehicle Brand
FAQ
What does the P0AA2 code mean?
P0AA2 is an OBD-II diagnostic trouble code that indicates: Hybrid/EV Battery Positive Contactor Circuit Stuck Open
What causes a P0AA2 error code?
The most common causes of P0AA2 include: 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).
How do I fix a P0AA2 diagnostic trouble code?
To fix P0AA2: Check the condition of the battery contactor. Check the integrity of the contactor control circuit. Check fuses and relays associated with the system. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0AA2?
Do not drive — repair immediately
How much does it cost to fix P0AA2?
The estimated repair cost for P0AA2 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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