OBD Guide
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U0294

Lost Communication With Powertrain Control Monitor Module

U0294 is an OBD-II diagnostic trouble code meaning: Lost Communication With Powertrain Control Monitor Module. Common causes: open or short circuit in the can bus, wiring harness damage. Estimated repair cost: $17–89.

Severity
🔴 High
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–89 (est.)

Symptoms

  • Check Engine light comes on
  • The car goes into emergency mode
  • Reduced engine power
  • Problems with gear shifting (if you have an automatic transmission)
  • Disabling some comfort systems

Causes

  • Open or short circuit in the CAN bus
  • Wiring harness damage
  • Malfunction of the powertrain control module
  • Problems with module power supply
  • Corrosion of connectors

How to Fix

  1. Check the integrity of the CAN bus
  2. Inspect the wiring harness for damage
  3. Check fuses and relays
  4. Diagnose the power plant control module
  5. Update module software if necessary

Related codes

U0293U0295U0296

Error U0294 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the U0294 code mean?

U0294 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Powertrain Control Monitor Module

What causes a U0294 error code?

The most common causes of U0294 include: Open or short circuit in the CAN bus; Wiring harness damage; Malfunction of the powertrain control module; Problems with module power supply.

How do I fix a U0294 diagnostic trouble code?

To fix U0294: Check the integrity of the CAN bus. Inspect the wiring harness for damage. Check fuses and relays. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with U0294?

Yes, but get it checked soon

How much does it cost to fix U0294?

The estimated repair cost for U0294 is $17–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat