P0AA0

Symptoms

• The vehicle goes into emergency mode
• Reduced power or inability to use electric propulsion
• The 'Check Engine' light comes on
• Errors in the high-voltage battery charging system
• Clicking or no sounds when the contactor operates when the ignition is turned on

Causes

• Malfunction of the contactor itself
• Open or short circuit in control circuit
• Problems with the high voltage system control unit
• Corrosion or poor contact in connectors
• Faulty high voltage system fuses

How to Fix

1. Check high voltage system fuses
2. Diagnose the condition of the contactor and its control circuit
3. Check connectors and connections for corrosion and damage
4. Test the operation of the high-voltage system control unit
5. If necessary, replace the contactor or repair control circuits
6. Repair only from an authorized dealer

Related codes

Error P0AA0 by Vehicle Brand