C0306 Possible Causes
- Faulty Transfer Case Motor
- Transfer Case Motor harness is open or shorted
- Transfer Case Motor circuit poor electrical connection
First diagnose C0306 code
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Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.
Cost of diagnosing the C0306 code
Labor: 1.0
The cost of diagnosing the C0306 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.C0306 Possible Symptoms
- Anti-Lock Brake System (ABS) Warning Light ON
- Engine Light ON (or Service Engine Soon Warning Light)
C0306 Description
The transfer case motor is a bi-directional, permanent magnet, D.C. motor. When energized, through motor control A or motor control B, the ground is provided by the opposing motor control circuit and then grounded through the transfer case shift control module ground circuit, the motor, through a series of gears, rotates a shaft which moves the mode and range forks to shift the transfer case between the following ranges:- 4HI
- The AUTO or the Adapt mode
- 2HI
- N
- 4LO
This DTC detects an open, short to voltage, or short to ground in the motor control A or motor control B circuits, or an open, or short to ground inside the motor.
C0306 More Information
Need more information on how to fix the C0306 code?Get Access to Factory Service Manuals
C0306 Information for specific makes
- C0306 BUICK Transfer Case Motor
- C0306 CADILLAC Transfer Case Motor
- C0306 CHEVROLET Transfer Case Motor
- C0306 GMC Transfer Case Motor
- C0306 HUMMER Transfer Case Motor
Related Information
C0306 Comments
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