OBD Guide
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P0A29

Hybrid/EV Battery Power Off Circuit High

P0A29 is an OBD-II diagnostic trouble code meaning: Hybrid/EV Battery Power Off Circuit High. Common causes: power control relay failure, damaged wiring or poor contacts. Estimated repair cost: $56–167.

Severity
🔴 High
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Hybrid system does not activate
  • Power reduction or emergency operation mode
  • Check Engine light comes on
  • The battery is not charging properly
  • Unusual sounds from the battery compartment

Causes

  • Power control relay failure
  • Damaged wiring or poor contacts
  • Problems with the hybrid battery management system
  • High resistance in the circuit
  • Short circuit in power supply

How to Fix

  1. Check power control circuit voltage
  2. Test relays and circuit fuses
  3. Inspect the wiring for damage
  4. Check connections and contacts in the circuit
  5. Hybrid Battery Management System Diagnostics
  6. Repair only from an authorized dealer

Error P0A29 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P0A29 code mean?

P0A29 is an OBD-II diagnostic trouble code that indicates: Hybrid/EV Battery Power Off Circuit High

What causes a P0A29 error code?

The most common causes of P0A29 include: Power control relay failure; Damaged wiring or poor contacts; Problems with the hybrid battery management system; High resistance in the circuit.

How do I fix a P0A29 diagnostic trouble code?

To fix P0A29: Check power control circuit voltage. Test relays and circuit fuses. Inspect the wiring for damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P0A29?

Yes, but get it checked soon

How much does it cost to fix P0A29?

The estimated repair cost for P0A29 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat