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C0374 Buick Code - Transfer Case System Malfunction

- Code Popularity: 823 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC C0374 Buick?

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 Transfer Case Motor/Encoder
  • Transfer Case Motor/Encoder harness is open or shorted
  • Transfer Case Motor/Encoder circuit poor electrical connection
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How to Fix the DTC C0374 Buick?

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.

Code Tech Notes

There is factory service bulletin with the following information:

The speed sensor signal may have become corrupted. Possible openings in the speed sensor wire insulation (twisted pairs) can allow water intrusion. Also, wire connections contaminated by water may result in short circuits and erroneous speed sensor readings. This most often occurs on the rear speed sensor circuit.

Correct problem by inspecting the wiring harness to the transfer case speed sensors. Completely inspect and test all wiring. Replace the affected twisted pairs.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C0374 Buick 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 C0374 Buick Description

The transfer case shift control module senses rear slip. After several attempts of applying torque to the front wheels, by activating the encoder motor, the transfer case still sees a difference in speed between the front propshaft speed sensor and rear propshaft speed sensor. The transfer case shift control module is unable to correct sensed wheel slip for 10 consecutive seconds.

OBDII Code C0374 Buick - Transfer Case System Malfunction - AutoCodes.com
C0374 Buick Code - Transfer Case System Malfunction

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Code C0374 Buick comments

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