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Engine-Codes – GMC – B0790 GMC

B0790 GMC Code - Transfer Case Neutral Indicator Circuit

Quick Answer

The B0790 GMC code refers to an issue with the Transfer Case Neutral Indicator Circuit. Common causes include Faulty neutral indicator switch, Wiring issues in the indicator circuit, Corrosion or loose connections in the circuit. 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
B0790 GMC indicates Transfer Case Neutral Indicator Circuit.
Common causes
Common causes include Faulty neutral indicator switch, Wiring issues in the indicator circuit, Corrosion or loose connections in the circuit.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 15, 2024
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Code B0790 GMC Description

The B0790 GMC code refers to an issue with the Transfer Case Neutral Indicator Circuit. The transfer case neutral indicator circuit is responsible for indicating to the driver when the transfer case is in neutral. This is crucial for the driver to know the exact position of the transfer case, especially when switching between different drive modes such as 2WD, 4WD high, and 4WD low. When this circuit malfunctions, it can lead to confusion for the driver and potentially cause issues with the vehicle's drivetrain system.

OBDII Code B0790 GMC - Transfer Case Neutral Indicator Circuit
B0790 GMC Code - Transfer Case Neutral Indicator Circuit

Common Causes of B0790 GMC

  1. Faulty neutral indicator switch.
  2. Wiring issues in the indicator circuit.
  3. Corrosion or loose connections in the circuit.
  4. Defective transfer case control module.
  5. Electrical issues in the transfer case system.

Symptoms of B0790 GMC

  1. Incorrect neutral indicator light on the dashboard.
  2. Difficulty shifting between drive modes.
  3. Transfer case getting stuck in neutral.
  4. Unintended engagement of 4WD modes.
  5. Strange noises coming from the transfer case.

How to Fix B0790 GMC

  1. Diagnose the issue by checking the neutral indicator switch, wiring, and connections for any faults.
  2. Test the transfer case control module for proper functionality.
  3. Repair or replace any damaged wiring or connections in the circuit.
  4. Replace the neutral indicator switch if it is faulty.
  5. Clear the diagnostic trouble codes and test the system to ensure the issue has been resolved.

Cost to Fix B0790 GMC

The cost of repairing the Transfer Case Neutral Indicator Circuit can vary depending on the specific cause of the issue and the labor rates in your area. On average, the parts for this repair can range from $50 to $200, while the labor cost can be between $100 and $300. Overall, you can expect to pay anywhere from $150 to $500 for this repair. Keep in mind that these are rough estimates, and actual costs may differ based on your location and the type of vehicle you drive. It's recommended to consult with a professional mechanic to get an accurate quote for your specific situation.

Need more information about the B0790 GMC code?

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Information for Specific GMC Models

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B0790 GMC Code

1. What are the common symptoms of OBDII code B0790 GMC related to the Transfer Case Neutral Indicator Circuit?

- The common symptoms include the transfer case neutral indicator not working or displaying incorrect information on the dashboard.

2. What are the possible causes of OBDII code B0790 GMC being triggered?

- The code B0790 GMC can be triggered due to issues with the transfer case position sensor, damaged wiring, or a faulty neutral indicator switch.

3. How can I diagnose the cause of OBDII code B0790 GMC related to the Transfer Case Neutral Indicator Circuit?

- Diagnosis involves checking the transfer case position sensor, inspecting the wiring harness for any damage, and testing the neutral indicator switch for proper functionality.

4. What are the recommended repair tips for fixing OBDII code B0790 GMC?

- Repair tips include replacing the transfer case position sensor if faulty, repairing any damaged wiring, and replacing the neutral indicator switch if necessary.

5. Can I continue driving my GMC vehicle with OBDII code B0790 related to the Transfer Case Neutral Indicator Circuit?

- It is not recommended to continue driving the vehicle with this code as it may lead to inaccurate readings of the transfer case position, potentially causing drivability issues.

6. How can I reset the OBDII code B0790 GMC after performing the necessary repairs?

- You can reset the code using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes to clear the error code.

7. Are there any preventive measures to avoid OBDII code B0790 GMC in the future?

- Regularly inspecting the transfer case components, wiring, and neutral indicator switch for any signs of wear or damage can help prevent the recurrence of this code.

8. Will OBDII code B0790 GMC cause any long-term damage to my vehicle if left unrepaired?

- Ignoring this code can potentially lead to issues with the transfer case operation and affect the overall drivability of the vehicle, so it is best to address it promptly.

9. How long does it typically take to repair OBDII code B0790 GMC related to the Transfer Case Neutral Indicator Circuit?

- The repair time can vary depending on the exact cause of the code, but it usually takes a few hours to diagnose and fix the issue.

10. Can a DIY enthusiast with some automotive knowledge fix OBDII code B0790 GMC themselves?

- If you have the necessary tools and knowledge, you may be able to diagnose and repair the issue yourself, but it is recommended to consult a professional if you are unsure.

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