OBD Guide
ENFRDEESPT

P0AA0

Hybrid/EV Battery Positive Contactor Circuit

P0AA0 is an OBD-II diagnostic trouble code meaning: Hybrid/EV Battery Positive Contactor Circuit. Common causes: malfunction of the contactor itself, open or short circuit in control circuit. Estimated repair cost: $56–278.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–278 (est.)

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

P0AA1P0AA2P0A9F

Error P0AA0 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P0AA0 code mean?

P0AA0 is an OBD-II diagnostic trouble code that indicates: Hybrid/EV Battery Positive Contactor Circuit

What causes a P0AA0 error code?

The most common causes of P0AA0 include: 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.

How do I fix a P0AA0 diagnostic trouble code?

To fix P0AA0: Check high voltage system fuses. Diagnose the condition of the contactor and its control circuit. Check connectors and connections for corrosion and damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P0AA0?

Do not drive — repair immediately

How much does it cost to fix P0AA0?

The estimated repair cost for P0AA0 is $56–278. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat