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C0327 Hummer Code - Transfer Case Encoder Circuit Malfunction

- Code Popularity: 8,633 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC C0327 Hummer?

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 Encoder
  • Transfer Case Encoder harness is open or shorted
  • Transfer Case Encoder circuit poor electrical connection
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How to Fix the DTC C0327 Hummer?

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 C0327 Hummer 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 C0327 Hummer Description

The transfer case encoder is a switch that converts a shaft position, representing a mode or range position, into electrical signals for use by the transfer case shift control module. The encoder houses 4 Hall effect sensors that are used for channels P, A, B, and C. These sensors provide a path to ground when a magnet, which is part of the shift rail, passes over them.
The transfer case shift control module supplies an 8-volt reference and a ground circuit for the encoder Hall effect sensors to function.
The transfer case shift control module supplies 5 volts on all the channels. As these channels are pulled to ground, the module can interpret the location of the transfer case shift position.
This DTC detects an open, short to ground, or a short to voltage in the encoder feed circuit, an open in the signal ground circuit, an open, short to ground, or short to voltage in the Encoder channel circuits.

OBDII Code C0327 Hummer - Transfer Case Encoder Circuit Malfunction - AutoCodes.com
C0327 Hummer Code - Transfer Case Encoder Circuit Malfunction

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