C0397 2014 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 2014 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 2014 GMC Sierra Description
What are the Possible Causes of the DTC C0397 2014 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 2014 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 2014 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 2014 GMC Sierra Code
1. What does the OBDII code C0397 mean on a 2014 GMC Sierra?
C0397 indicates an issue with the transfer case clutch, specifically related to a circuit malfunction or performance problem in the transfer case control module.
2. What are the symptoms of OBDII code C0397 on a 2014 GMC Sierra?
Common symptoms include the Service 4WD light illuminating, inability to shift between 2WD and 4WD modes, unusual noises from the transfer case, or reduced 4WD performance.
3. What causes the C0397 code to appear on my GMC Sierra?
Potential causes include a faulty transfer case clutch, damaged wiring or connectors, a malfunctioning transfer case control module, or low or contaminated transfer case fluid.
4. Can I still drive my 2014 GMC Sierra with the C0397 code?
While the truck may still be drivable, it could have reduced 4WD functionality, which may affect performance in off-road or slippery conditions. It’s best to address the issue promptly.
5. How do I diagnose the C0397 code on a GMC Sierra?
Start by scanning for additional codes, visually inspecting the wiring and connectors for damage, checking the transfer case fluid level and quality, and testing the transfer case clutch circuit for proper operation.
6. How do I fix the C0397 code on a 2014 GMC Sierra?
Repairs may include replacing the transfer case clutch, repairing or replacing damaged wiring or connectors, flushing and refilling the transfer case fluid, or reprogramming or replacing the transfer case control module.
7. How much does it cost to repair the C0397 code on a GMC Sierra?
The cost varies depending on the issue, ranging from $100 for fluid replacement to over $1,000 for replacing the transfer case clutch or control module.
8. Is the C0397 code covered under warranty for a 2014 GMC Sierra?
It depends on your warranty terms. Powertrain warranties might cover transfer case components, but check with your dealer for specifics.
9. Can low transfer case fluid cause the C0397 code on a GMC Sierra?
Yes, low or contaminated transfer case fluid can lead to improper clutch operation and trigger the C0397 code.
10. Do I need to reprogram the transfer case control module after fixing the C0397 code?
In some cases, reprogramming the module may be necessary if it was replaced or if software updates are required to resolve the issue.
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