B3920 GMC Code - Seat Motors Group 1 Common Circuit
Quick Answer
The B3920 diagnostic trouble code (DTC) for GMC vehicles refers to an issue with the Seat Motors Group 1 Common Circuit. Common causes include Damaged or frayed wiring in the seat motor circuit, Malfunctioning seat motor components, Blown fuse related to the seat motors. 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
- B3920 GMC indicates Seat Motors Group 1 Common Circuit.
- Common causes
- Common causes include Damaged or frayed wiring in the seat motor circuit, Malfunctioning seat motor components, Blown fuse related to the seat motors.
- 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.
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Code B3920 GMC Description
The B3920 diagnostic trouble code (DTC) for GMC vehicles refers to an issue with the Seat Motors Group 1 Common Circuit. This code indicates a problem with the electrical circuit that controls various seat motors in the vehicle, such as those responsible for adjusting the seat position, reclining the seat back, or moving the seat forward and backward.
Common Causes of B3920 GMC
- Damaged or frayed wiring in the seat motor circuit
- Malfunctioning seat motor components
- Blown fuse related to the seat motors
- Faulty seat motor control module
- Poor electrical connections within the seat motors circuit
Symptoms of B3920 GMC
- Inability to adjust the seat position
- Seat motors not responding to control inputs
- Seat stuck in one position
- Unusual noises coming from the seat when attempting to adjust it
- Seat jerking or moving erratically during adjustment
How to Fix B3920 GMC
- Begin by conducting a thorough visual inspection of the seat motor circuit, looking for any visible damage to the wiring or connectors.
- Use a multimeter to test the continuity of the wiring and check for any shorts or open circuits that may be causing the issue.
- Inspect the seat motor components themselves for any signs of damage or malfunction, such as burned-out motors or worn gears.
- Check the fuse related to the seat motors and replace it if necessary.
- If all other components check out, consider testing or replacing the seat motor control module to address any potential issues with its functionality.
Cost to Fix B3920 GMC
The typical repair costs for addressing the B3920 Seat Motors Group 1 Common Circuit issue can vary depending on the extent of the problem and the specific components that require repair or replacement. On average, the repair costs for this issue can range from $150 to $500, including parts and labor. However, it is important to note that the actual costs may differ based on factors such as the location of the repair, the make and model of the vehicle, and the hourly labor rates charged by the auto repair shop. It is advisable to consult with a professional mechanic to obtain a more accurate estimate for addressing this particular DTC.
Tech Notes for B3920 GMC
B3920 02 Group 1 Seat Motors Circuit Shorted to Ground
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Information for Specific GMC Models
- B3920 2014 GMC Sierra — Seat Motors Group 1 Common Circuit
- B3920 2015 GMC Sierra — Seat Motors Group 1 Common Circuit
- B3920 2016 GMC Sierra — Seat Motors Group 1 Common Circuit
- B3920 2017 GMC Sierra — Seat Motors Group 1 Common Circuit
- B3920 2018 GMC Sierra — Seat Motors Group 1 Common Circuit
Frequently Asked Questions about B3920 GMC Code
1. What are the common symptoms of OBDII code B3920 GMC related to the Seat Motors Group 1 Common Circuit?
- Common symptoms include non-functioning seat motors, inability to adjust seat positions, and inoperative seat memory functions.
2. What are some possible causes of OBDII code B3920 GMC for the Seat Motors Group 1 Common Circuit?
- Potential causes include faulty seat motor components, damaged wiring or connectors, and issues with the seat control module.
3. How can I diagnose OBDII code B3920 GMC for the Seat Motors Group 1 Common Circuit?
- Diagnosis involves using a scan tool to retrieve the specific fault code, conducting a visual inspection of seat motor components, and testing the wiring and connectors for continuity.
4. What are some tips for repairing OBDII code B3920 GMC related to the Seat Motors Group 1 Common Circuit?
- Repair tips include repairing or replacing damaged wiring, connectors, or seat motor components, resetting the seat control module, and ensuring proper seat calibration.
5. Can OBDII code B3920 GMC for the Seat Motors Group 1 Common Circuit be fixed without professional help?
- While some basic troubleshooting and repairs can be done by DIY enthusiasts, complex issues may require the expertise of a professional mechanic familiar with automotive electronics.
6. Is it safe to continue driving with OBDII code B3920 GMC triggered for the Seat Motors Group 1 Common Circuit?
- It is not recommended to drive with this code active, as it may affect the functionality of the seat adjustment system, potentially compromising driver comfort and safety.
7. How can I prevent OBDII code B3920 GMC from recurring in the future?
- Regular maintenance of the seat adjustment system, avoiding overloading the seats, and addressing any issues promptly can help prevent the recurrence of this fault code.
8. Will resetting the OBDII code B3920 GMC for the Seat Motors Group 1 Common Circuit solve the issue?
- Resetting the code may temporarily clear the warning light, but if the underlying issue is not addressed, the code is likely to reappear once the system detects the fault again.
9. Are there any recalls or technical service bulletins related to OBDII code B3920 GMC and the Seat Motors Group 1 Common Circuit?
- It is recommended to check with the vehicle manufacturer or authorized service centers for any relevant recalls or technical service bulletins addressing this specific fault code.
10. Can weather conditions or environmental factors trigger OBDII code B3920 GMC for the Seat Motors Group 1 Common Circuit?
- Extreme temperatures, moisture exposure, or other environmental factors can contribute to electrical issues that may trigger this fault code. Regular inspection and maintenance can help mitigate these risks.
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