OBD Guide
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C0231

Engine Control Module Failure

C0231 is an OBD-II diagnostic trouble code meaning: Engine Control Module Failure. Common causes: ecu damage, ecu power problems. Estimated repair cost: $167–556.

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

Symptoms

  • Engine won't start
  • Power Loss
  • Unstable idling
  • Check Engine light comes on

Causes

  • ECU damage
  • ECU power problems
  • Short circuit in wiring harness
  • ECU software failure
  • Contact corrosion

How to Fix

  1. Check ECU supply voltage
  2. Inspect the wiring harness for damage
  3. Check ECU connections and contacts
  4. Flash or replace ECU if necessary

Related codes

P0600P0601P0602P0603

Error C0231 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the C0231 code mean?

C0231 is an OBD-II diagnostic trouble code that indicates: Engine Control Module Failure

What causes a C0231 error code?

The most common causes of C0231 include: ECU damage; ECU power problems; Short circuit in wiring harness; ECU software failure.

How do I fix a C0231 diagnostic trouble code?

To fix C0231: Check ECU supply voltage. Inspect the wiring harness for damage. Check ECU connections and contacts. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C0231?

Limited driving only, diagnose soon

How much does it cost to fix C0231?

The estimated repair cost for C0231 is $167–556. Actual cost depends on your vehicle, location, and labor rates.

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