OBD Guide
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U01A0

Lost Communication With Hybrid/EV Battery Interface Control Module A

U01A0 is an OBD-II diagnostic trouble code meaning: Lost Communication With Hybrid/EV Battery Interface Control Module A. Common causes: open or short circuit in the can bus, battery management module malfunction. Estimated repair cost: $56–278.

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

Symptoms

  • Check Engine light comes on
  • Reduced vehicle power
  • Switching to emergency mode
  • Inability to charge the battery
  • Displaying warnings on the instrument panel

Causes

  • Open or short circuit in the CAN bus
  • Battery management module malfunction
  • Problems with module power supply (blown fuse)
  • Corroded or damaged connectors
  • Software error in control module

How to Fix

  1. Check fuses associated with the battery control module
  2. Inspect connectors and wiring harness for damage
  3. Conduct CAN bus diagnostics using an oscilloscope
  4. Read error codes from the battery management module
  5. Update or reflash module software
  6. Repair only from an authorized dealer

Related codes

U01A1U0100U0121

Error U01A0 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the U01A0 code mean?

U01A0 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Hybrid/EV Battery Interface Control Module A

What causes a U01A0 error code?

The most common causes of U01A0 include: Open or short circuit in the CAN bus; Battery management module malfunction; Problems with module power supply (blown fuse); Corroded or damaged connectors.

How do I fix a U01A0 diagnostic trouble code?

To fix U01A0: Check fuses associated with the battery control module. Inspect connectors and wiring harness for damage. Conduct CAN bus diagnostics using an oscilloscope. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U01A0?

Do not drive — repair immediately

How much does it cost to fix U01A0?

The estimated repair cost for U01A0 is $56–278. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat