B0790 GMC 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 GMC 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 GMC 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 GMC?
- 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 GMC?
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 GMC 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 GMC code?
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Information for Specific GMC Models
- B0790 2014 GMC Sierra — Transfer Case Neutral Indicator Circuit
- B0790 2015 GMC Sierra — Transfer Case Neutral Indicator Circuit
- B0790 2016 GMC Sierra — Transfer Case Neutral Indicator Circuit
- B0790 2017 GMC Sierra — Transfer Case Neutral Indicator Circuit
- B0790 2018 GMC Sierra — Transfer Case Neutral Indicator Circuit
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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