OBD Guide
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C0394

Rear Axle Coupling Solenoid Temperature Sensor Circuit Short to Ground or Open

C0394 is an OBD-II diagnostic trouble code meaning: Rear Axle Coupling Solenoid Temperature Sensor Circuit Short to Ground or Open. Common causes: broken wire in the temperature sensor circuit, short circuit to ground. Estimated repair cost: $33–111.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–111 (est.)

Symptoms

  • Incorrect operation of the all-wheel drive system
  • The check engine or all-wheel drive light comes on
  • Poor handling on slippery surfaces
  • Rear axle clutch overheating

Causes

  • Broken wire in the temperature sensor circuit
  • Short circuit to ground
  • Malfunction of the temperature sensor itself
  • Connector problems or contact corrosion
  • Rear axle clutch solenoid malfunction

How to Fix

  1. Check the integrity of the wiring and connectors of the temperature sensor circuit
  2. Check the resistance of the temperature sensor (compare with nominal values)
  3. Check for short circuit to ground
  4. If necessary, replace the temperature sensor
  5. Check system operation after troubleshooting
  6. Reset the error using an OBD-II scanner

Related codes

C0393C0395C0396

Error C0394 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the C0394 code mean?

C0394 is an OBD-II diagnostic trouble code that indicates: Rear Axle Coupling Solenoid Temperature Sensor Circuit Short to Ground or Open

What causes a C0394 error code?

The most common causes of C0394 include: Broken wire in the temperature sensor circuit; Short circuit to ground; Malfunction of the temperature sensor itself; Connector problems or contact corrosion.

How do I fix a C0394 diagnostic trouble code?

To fix C0394: Check the integrity of the wiring and connectors of the temperature sensor circuit. Check the resistance of the temperature sensor (compare with nominal values). Check for short circuit to ground. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C0394?

Limited driving only, diagnose soon

How much does it cost to fix C0394?

The estimated repair cost for C0394 is $33–111. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat