C0397 2016 GMC Sierra Code - Transfer Case Clutch
Quick Answer
In 4WD/AWD Automatic range, the Transfer Case Control Module monitors the front and rear wheel speed sensors for slip. Common causes include Faulty Transfer Case Motor (Transfer Case Two/Four Wheel Drive Actuator), Transfer Case Motor harness is open or shorted, Transfer Case Motor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- C0397 2016 GMC Sierra indicates Transfer Case Clutch.
- Common causes
- Common causes include Faulty Transfer Case Motor (Transfer Case Two/Four Wheel Drive Actuator), Transfer Case Motor harness is open or shorted, Transfer Case Motor circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code C0397 2016 GMC Sierra Description
What are the Possible Causes of the DTC C0397 2016 GMC Sierra?
- Faulty Transfer Case Motor (Transfer Case Two/Four Wheel Drive Actuator)
- Transfer Case Motor harness is open or shorted
- Transfer Case Motor circuit poor electrical connection
- Faulty Transfer Case Control Module
How to Fix the DTC C0397 2016 GMC Sierra?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
C0397:58 Transfer Case Clutch Performance
C0397:4B (if equipped) Transfer Case Clutch Calibration Not Learned
C0397:F3 Transfer Case Clutch Worn Out Clutch
C0397:F4 Transfer Case Range Position Sensor Over Travel
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the C0397 2016 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about C0397 2016 GMC Sierra Code
1. What does the OBDII code C0397 mean on a 2016 GMC Sierra?
C0397 indicates an issue with the transfer case clutch control circuit, which affects the operation of the transfer case in your vehicle's drivetrain.
2. What are the common symptoms of code C0397 on a 2016 GMC Sierra?
Symptoms may include the "Service 4WD" message on the dashboard, difficulty shifting between 2WD and 4WD modes, or inconsistent transfer case operation.
3. What causes the C0397 code to appear on a 2016 GMC Sierra?
Common causes include a faulty transfer case clutch, damaged wiring or connectors in the clutch control circuit, or a malfunctioning transfer case control module (TCCM).
4. Can a bad transfer case motor cause the C0397 code?
Yes, a failing transfer case motor or actuator can contribute to this code if it prevents the proper engagement of the transfer case clutch.
5. How do you diagnose the C0397 code on a 2016 GMC Sierra?
Diagnosis typically involves scanning for additional codes, inspecting the wiring and connectors related to the transfer case clutch, and testing the transfer case control module and motor.
6. Can I drive my 2016 GMC Sierra with the C0397 code?
Driving with this code is not recommended, as it may cause drivetrain issues, limit 4WD functionality, or lead to further damage to the transfer case system.
7. How do you fix the C0397 code on a 2016 GMC Sierra?
Repairs may include replacing the transfer case clutch, repairing damaged wiring, or replacing the transfer case control module if it is determined to be faulty.
8. How much does it cost to fix the C0397 code on a 2016 GMC Sierra?
Repair costs can vary, but replacing a transfer case clutch or motor may cost between $500 and $1,200, depending on labor rates and parts.
9. Can a software update fix the C0397 code on a 2016 GMC Sierra?
In some cases, a software update for the transfer case control module may resolve the issue, but this depends on the root cause of the problem.
10. How can I prevent the C0397 code from occurring again?
Regular maintenance of the transfer case system, inspecting wiring for damage, and promptly addressing any drivetrain issues can help prevent this code from reappearing.
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