OBD Guide
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U0053

Vehicle Communication Bus C (-) High

U0053 is an OBD-II diagnostic trouble code meaning: Vehicle Communication Bus C (-) High. Common causes: open or short circuit in can-c bus wiring, fault in one of the modules connected to the bus. Estimated repair cost: $6–56.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$6–56 (est.)

Symptoms

  • Check Engine Light Is On
  • Incorrect operation of various vehicle systems
  • Lack of communication with some modules during diagnostics
  • Problems starting the engine
  • Dashboard malfunctions

Causes

  • Open or short circuit in CAN-C bus wiring
  • Fault in one of the modules connected to the bus
  • Problems with module power supply
  • Corrosion or poor contact in connectors
  • Damage to CAN bus terminators

How to Fix

  1. Check the integrity of the CAN-C bus wiring
  2. Check voltage and resistance on the bus
  3. Disable the modules one by one to find the faulty one.
  4. Check power supply and grounding of modules
  5. Check the condition of connectors and contacts

Related codes

U0051U0052U0054

Error U0053 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the U0053 code mean?

U0053 is an OBD-II diagnostic trouble code that indicates: Vehicle Communication Bus C (-) High

What causes a U0053 error code?

The most common causes of U0053 include: Open or short circuit in CAN-C bus wiring; Fault in one of the modules connected to the bus; Problems with module power supply; Corrosion or poor contact in connectors.

How do I fix a U0053 diagnostic trouble code?

To fix U0053: Check the integrity of the CAN-C bus wiring. Check voltage and resistance on the bus. Disable the modules one by one to find the faulty one.. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U0053?

Limited driving only, diagnose soon

How much does it cost to fix U0053?

The estimated repair cost for U0053 is $6–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat