P0AA3
Hybrid/EV Battery Negative Contactor Circuit
P0AA3 is an OBD-II diagnostic trouble code meaning: Hybrid/EV Battery Negative Contactor Circuit. Common causes: malfunction of the contactor itself, open or short circuit in the circuit. Estimated repair cost: $56–278.
Symptoms
- The car goes into emergency mode
- Reduced power or inability to start
- Check Engine Light Is On
- Hybrid system warning
Causes
- Malfunction of the contactor itself
- Open or short circuit in the circuit
- Problems with the hybrid system control module
- Corrosion of contacts or connectors
- High voltage relay fault
How to Fix
- Check the condition of the contactor and its circuit
- Check connections and connectors for corrosion
- Test contactor resistance
- Check power and control signals
- Replace faulty components
Related codes
Error P0AA3 by Vehicle Brand
FAQ
What does the P0AA3 code mean?
P0AA3 is an OBD-II diagnostic trouble code that indicates: Hybrid/EV Battery Negative Contactor Circuit
What causes a P0AA3 error code?
The most common causes of P0AA3 include: Malfunction of the contactor itself; Open or short circuit in the circuit; Problems with the hybrid system control module; Corrosion of contacts or connectors.
How do I fix a P0AA3 diagnostic trouble code?
To fix P0AA3: Check the condition of the contactor and its circuit. Check connections and connectors for corrosion. Test contactor resistance. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0AA3?
Do not drive — repair immediately
How much does it cost to fix P0AA3?
The estimated repair cost for P0AA3 is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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