OBD Guide
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U0146

Lost Communication With Serial Data Gateway Module A

U0146 is an OBD-II diagnostic trouble code meaning: Lost Communication With Serial Data Gateway Module A. Common causes: open or short circuit in the communication circuit, data gateway module failure. Estimated repair cost: $56–222.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–222 (est.)

Symptoms

  • Check Engine light comes on
  • Incorrect operation of several vehicle systems
  • The car goes into emergency mode
  • Problems with diagnostics via OBD-II connector
  • Infotainment system malfunctions

Causes

  • Open or short circuit in the communication circuit
  • Data Gateway Module Failure
  • Module power problems
  • Corroded connectors or damaged wiring harness
  • Software error in the module

How to Fix

  1. Check the integrity of the wiring harness and connectors
  2. Check power and ground of the data gateway module
  3. Scan all modules for additional error codes
  4. Check or replace the data gateway module
  5. Update module software if necessary

Related codes

U0140U0141U0155

Error U0146 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the U0146 code mean?

U0146 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Serial Data Gateway Module A

What causes a U0146 error code?

The most common causes of U0146 include: Open or short circuit in the communication circuit; Data Gateway Module Failure; Module power problems; Corroded connectors or damaged wiring harness.

How do I fix a U0146 diagnostic trouble code?

To fix U0146: Check the integrity of the wiring harness and connectors. Check power and ground of the data gateway module. Scan all modules for additional error codes. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U0146?

Limited driving only, diagnose soon

How much does it cost to fix U0146?

The estimated repair cost for U0146 is $56–222. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat