OBD Guide
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U04AA

Invalid Data Received From Hybrid/EV Battery Interface Control Module J

U04AA is an OBD-II diagnostic trouble code meaning: Invalid Data Received From Hybrid/EV Battery Interface Control Module J. Common causes: battery interface control module malfunction, damage to the wiring harness to the module. Estimated repair cost: $167–556.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$167–556 (est.)

Symptoms

  • Check Engine light comes on
  • Reduced vehicle power
  • Switching to emergency mode
  • Battery charging problems (for PHEV)
  • Incorrect display of battery charge level

Causes

  • Battery Interface Control Module Malfunction
  • Damage to the wiring harness to the module
  • Poor contact in connectors
  • Software problems
  • Short circuit in communication circuit

How to Fix

  1. Check connections and integrity of wiring harness
  2. Scan the module for additional errors
  3. Update module software
  4. Check power supply and grounding of the module
  5. Replace the Battery Interface Control Module if necessary
  6. Repair only from an authorized dealer

Related codes

U04ABU04ACP0A80

Error U04AA by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the U04AA code mean?

U04AA is an OBD-II diagnostic trouble code that indicates: Invalid Data Received From Hybrid/EV Battery Interface Control Module J

What causes a U04AA error code?

The most common causes of U04AA include: Battery Interface Control Module Malfunction; Damage to the wiring harness to the module; Poor contact in connectors; Software problems.

How do I fix a U04AA diagnostic trouble code?

To fix U04AA: Check connections and integrity of wiring harness. Scan the module for additional errors. Update module software. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U04AA?

Limited driving only, diagnose soon

How much does it cost to fix U04AA?

The estimated repair cost for U04AA is $167–556. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat