OBD Guide
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C0273

Open In ABS Motor Relay Circuit

C0273 is an OBD-II diagnostic trouble code meaning: Open In ABS Motor Relay Circuit. Common causes: broken wires in the harness to the abs motor relay, oxidation or corrosion of relay contacts. Estimated repair cost: $33–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–167 (est.)

Symptoms

  • The ABS light on the instrument panel is on
  • Disabling the ABS system
  • ABS pump does not work during testing
  • Loss of EBD/ESP functionality (if applicable)

Causes

  • Broken wires in the harness to the ABS motor relay
  • Oxidation or corrosion of relay contacts
  • ABS motor relay malfunction
  • Poor contact in the ABS hydraulic modulator connectors
  • Problems with power or ground of the relay circuit

How to Fix

  1. Check ABS relay circuit fuse
  2. Visually inspect the wiring harness to the ABS module for damage.
  3. Check the resistance and control signal at the relay connector
  4. Clean relay contacts and connectors
  5. If necessary, replace the ABS motor relay
  6. Check the operation of the ABS pump after repair
  7. Clear the error and check for its reappearance

Related codes

C0221C0245C0265

Error C0273 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the C0273 code mean?

C0273 is an OBD-II diagnostic trouble code that indicates: Open In ABS Motor Relay Circuit

What causes a C0273 error code?

The most common causes of C0273 include: Broken wires in the harness to the ABS motor relay; Oxidation or corrosion of relay contacts; ABS motor relay malfunction; Poor contact in the ABS hydraulic modulator connectors.

How do I fix a C0273 diagnostic trouble code?

To fix C0273: Check ABS relay circuit fuse. Visually inspect the wiring harness to the ABS module for damage.. Check the resistance and control signal at the relay connector. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C0273?

Limited driving only, diagnose soon

How much does it cost to fix C0273?

The estimated repair cost for C0273 is $33–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat