OBD Guide
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U0072

Vehicle Communication Bus E (-) shorted to Bus E (+)

U0072 is an OBD-II diagnostic trouble code meaning: Vehicle Communication Bus E (-) shorted to Bus E (+). Common causes: short circuit in communication bus wiring e, damage to communication bus connectors e. Estimated repair cost: $6–56.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$6–56 (est.)

Symptoms

  • Check Engine or other warning lights
  • Loss of communication between ECUs
  • Incorrect operation of various vehicle systems (for example, ABS, ESP)
  • Difficulty starting the engine
  • Storing fault codes in various ECUs

Causes

  • Short circuit in communication bus wiring E
  • Damage to communication bus connectors E
  • Malfunction of one of the ECUs connected to the communication bus E
  • Corrosion or oxidation of contacts in connectors
  • Mechanical damage to the wiring harness

How to Fix

  1. Check the E bus wiring and connectors for damage and short circuits.
  2. Check the resistance between wires (-) and (+) of communication bus E
  3. Disconnect the computers connected to the E communication bus one by one to identify the faulty unit
  4. Replace damaged wiring or connectors
  5. Replace the faulty ECU

Related codes

U0073U0100U0101

Error U0072 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the U0072 code mean?

U0072 is an OBD-II diagnostic trouble code that indicates: Vehicle Communication Bus E (-) shorted to Bus E (+)

What causes a U0072 error code?

The most common causes of U0072 include: Short circuit in communication bus wiring E; Damage to communication bus connectors E; Malfunction of one of the ECUs connected to the communication bus E; Corrosion or oxidation of contacts in connectors.

How do I fix a U0072 diagnostic trouble code?

To fix U0072: Check the E bus wiring and connectors for damage and short circuits.. Check the resistance between wires (-) and (+) of communication bus E. Disconnect the computers connected to the E communication bus one by one to identify the faulty unit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U0072?

Do not drive — repair immediately

How much does it cost to fix U0072?

The estimated repair cost for U0072 is $6–56. Actual cost depends on your vehicle, location, and labor rates.

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