B0790 2017 GMC Sierra Code - Transfer Case Neutral Indicator Circuit
Quick Answer
The Neutral indicator circuit consists of a Light Emitting Diode (LED) feed circuit, an LED, and an LED control circuit. Common causes include Faulty Transfer Case Select Switch, Transfer Case Select Switch harness is open or shorted, Transfer Case Select Switch circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- B0790 2017 GMC Sierra indicates Transfer Case Neutral Indicator Circuit.
- Common causes
- Common causes include Faulty Transfer Case Select Switch, Transfer Case Select Switch harness is open or shorted, Transfer Case Select Switch circuit poor electrical connection.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
Code B0790 2017 GMC Sierra Description
The TCCM tests the Neutral indicator circuit for unexpected voltage by monitoring the B+ supplied by the BCM on the Ignition 1 voltage circuit by grounding the Neutral indicator control circuit for 2 seconds during the Bulb Test at key ON.
What are the Possible Causes of the DTC B0790 2017 GMC Sierra?
- Faulty Transfer Case Select Switch
- Transfer Case Select Switch harness is open or shorted
- Transfer Case Select Switch circuit poor electrical connection
- Faulty Transfer Case Shift Control Module (TCCM)
How to Fix the DTC B0790 2017 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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B0790 2017 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.
Need more information about the B0790 2017 GMC Sierra code?
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Frequently Asked Questions about B0790 2017 GMC Sierra Code
1. What are the common symptoms of OBDII code B0790 in a 2017 GMC Sierra?
The common symptoms include the transfer case neutral indicator not functioning properly, the indicator light staying on or flashing, and potential issues with shifting gears.
2. What is the most common cause of OBDII code B0790 in a 2017 GMC Sierra?
The most common cause of this code is a malfunction in the transfer case neutral indicator circuit, which can be caused by wiring issues, a faulty indicator switch, or a problem with the transfer case control module.
3. How can I diagnose the transfer case neutral indicator circuit issue in my 2017 GMC Sierra?
Diagnosing the issue involves checking the wiring connections, testing the indicator switch for proper functionality, and using a diagnostic tool to scan for trouble codes in the transfer case control module.
4. Can I continue driving my 2017 GMC Sierra with OBDII code B0790 present?
It is not recommended to continue driving with this code present, as it can lead to potential issues with the transfer case operation and affect the vehicle's drivability.
5. How can I repair OBDII code B0790 in my 2017 GMC Sierra?
Repairing this code typically involves fixing any wiring issues, replacing the transfer case neutral indicator switch if necessary, and resetting the trouble codes using a diagnostic tool.
6. Are there any DIY tips for troubleshooting OBDII code B0790 in a 2017 GMC Sierra?
DIY tips include visually inspecting the wiring for any damage, checking the indicator switch for proper operation, and consulting the vehicle's service manual for specific troubleshooting steps.
7. Can a faulty transfer case neutral indicator circuit affect the 4WD system in a 2017 GMC Sierra?
Yes, a faulty circuit can potentially affect the operation of the 4WD system, as the indicator is crucial for informing the driver of the current transfer case mode.
8. Is it necessary to reset the transfer case control module after repairing OBDII code B0790 in a 2017 GMC Sierra?
Yes, it is recommended to reset the transfer case control module after repairing the issue to clear any stored trouble codes and ensure proper communication between the components.
9. How can I prevent OBDII code B0790 from reoccurring in my 2017 GMC Sierra?
Regularly inspecting the transfer case neutral indicator circuit for any signs of wear or damage, ensuring proper wiring connections, and addressing any issues promptly can help prevent the code from reoccurring.
10. Should I seek professional help to diagnose and repair OBDII code B0790 in my 2017 GMC Sierra?
If you are not comfortable diagnosing or repairing electrical issues in your vehicle, it is advisable to seek professional help from a certified mechanic or dealership to ensure the problem is addressed correctly.
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