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C0394 GMC Code - Rear Axle Coupling Solenoid Temperature Sensor Circuit Short to Ground or Open

- Code Popularity: 3,103 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC C0394 GMC?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Rear Axle Coupling Solenoid Temperature Sensor
  • Rear Axle Coupling Solenoid Temperature Sensor harness is open or shorted
  • Rear Axle Coupling Solenoid Temperature Sensor circuit poor electrical connection
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How to Fix the DTC C0394 GMC?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C0394 GMC code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Anti-Lock Brake System (ABS) Warning Light ON
  • Engine Light ON (or Service Engine Soon Warning Light)

Code C0394 GMC Description

The rear differential Clutch Control Module (CCM) provides a power and ground circuits to the temperature sensor. When the temperature of the module is determined to be beyond its limits, the CCM will temporarily disable the rear drive system.

OBDII Code C0394 GMC - Rear Axle Coupling Solenoid Temperature Sensor Circuit Short to Ground or Open - AutoCodes.com
C0394 GMC Code - Rear Axle Coupling Solenoid Temperature Sensor Circuit Short to Ground or Open

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