OBD Guide
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U0403

Invalid Data Received From Transfer Case Control Module

U0403 is an OBD-II diagnostic trouble code meaning: Invalid Data Received From Transfer Case Control Module. Common causes: transfer case control module malfunction, damaged wiring harness or poor connections. Estimated repair cost: $56–333.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–333 (est.)

Symptoms

  • Check Engine Light Is On
  • Problems with switching all-wheel drive modes
  • Reduced vehicle performance
  • Unstable transmission operation

Causes

  • Transfer case control module malfunction
  • Damaged wiring harness or poor connections
  • Software error in control module
  • Module power problems
  • Short circuit in signal circuits

How to Fix

  1. Check wiring harness and module connectors
  2. Check the module supply voltage
  3. Scan for additional trouble codes
  4. Update or reflash module software
  5. Replacing the transfer case control module if necessary

Related codes

U0401U0402U0404

Error U0403 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the U0403 code mean?

U0403 is an OBD-II diagnostic trouble code that indicates: Invalid Data Received From Transfer Case Control Module

What causes a U0403 error code?

The most common causes of U0403 include: Transfer case control module malfunction; Damaged wiring harness or poor connections; Software error in control module; Module power problems.

How do I fix a U0403 diagnostic trouble code?

To fix U0403: Check wiring harness and module connectors. Check the module supply voltage. Scan for additional trouble codes. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U0403?

Yes, but get it checked soon

How much does it cost to fix U0403?

The estimated repair cost for U0403 is $56–333. Actual cost depends on your vehicle, location, and labor rates.

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