B3951 GMC Code - Right Rear Turn Signal Circuit
Quick Answer
The B3951 GMC code indicates a malfunction in the right rear turn signal circuit of the vehicle. Common causes include Faulty right rear turn signal bulb, Damaged wiring or connectors in the turn signal circuit, Corrosion in the turn signal socket. 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
- B3951 GMC indicates Right Rear Turn Signal Circuit.
- Common causes
- Common causes include Faulty right rear turn signal bulb, Damaged wiring or connectors in the turn signal circuit, Corrosion in the turn signal socket.
- 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 B3951 GMC Description
The B3951 GMC code indicates a malfunction in the right rear turn signal circuit of the vehicle. This code is triggered when the control module detects an issue with the electrical circuit that controls the right rear turn signal. The turn signal circuit is an essential component of the vehicle's lighting system, responsible for indicating the intention to turn or change lanes to other drivers on the road.
Common Causes of B3951 GMC
- Faulty right rear turn signal bulb
- Damaged wiring or connectors in the turn signal circuit
- Corrosion in the turn signal socket
- Faulty turn signal switch
- Issues with the control module or fuse related to the turn signal circuit
Symptoms of B3951 GMC
- Right rear turn signal not working
- Fast blinking of the turn signal indicator on the dashboard
- Dim or flickering right rear turn signal
- Warning light on the dashboard related to the turn signal circuit
- Vehicle failing inspection due to turn signal malfunction
How to Fix B3951 GMC
- Inspect the right rear turn signal bulb and replace if burnt out or damaged.
- Check the wiring and connectors in the turn signal circuit for any signs of damage or corrosion. Repair or replace as necessary.
- Test the turn signal switch to ensure it is functioning correctly. Replace if faulty.
- Check the control module and fuses related to the turn signal circuit for any issues. Replace as needed.
- Clear the diagnostic trouble codes and test the right rear turn signal to verify proper operation.
Cost to Fix B3951 GMC
The typical repair costs for addressing the B3951 GMC code can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. On average, the repair for a faulty turn signal bulb or socket can range from $50 to $100, while more complex issues with the wiring or control module may cost between $100 to $300 or more. It is advisable to check with local auto repair shops for a more accurate estimate based on your vehicle make and model. Additionally, factors such as location, labor rates, and the extent of the repair needed can influence the final cost.
Tech Notes for B3951 GMC
B3951:02 Right Rear Turn Signal Circuit Short to Ground
B3951:04 Right Rear Turn Signal Circuit Open
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Information for Specific GMC Models
- B3951 2014 GMC Sierra — Right Rear Turn Signal Circuit
- B3951 2015 GMC Sierra — Right Rear Turn Signal Circuit
- B3951 2016 GMC Sierra — Right Rear Turn Signal Circuit
- B3951 2017 GMC Sierra — Right Rear Turn Signal Circuit
- B3951 2018 GMC Sierra — Right Rear Turn Signal Circuit
Frequently Asked Questions about B3951 GMC Code
1. What are the common symptoms of OBDII code B3951 GMC related to the Right Rear Turn Signal Circuit?
- The common symptoms include a malfunctioning or completely non-functional right rear turn signal light on the vehicle.
2. What are the potential causes of OBDII code B3951 GMC for the Right Rear Turn Signal Circuit?
- Possible causes can include a faulty right rear turn signal bulb, a damaged wiring harness, a defective turn signal socket, or a problem with the vehicle's body control module.
3. How can I diagnose the issue causing OBDII code B3951 GMC for the Right Rear Turn Signal Circuit?
- You can start by visually inspecting the right rear turn signal bulb, checking the wiring for any visible damage, testing the turn signal socket for proper connectivity, and using a diagnostic scan tool to read the fault codes stored in the vehicle's system.
4. Are there any quick repair tips for fixing OBDII code B3951 GMC related to the Right Rear Turn Signal Circuit?
- Quick repair tips may include replacing the right rear turn signal bulb, repairing any damaged wiring, ensuring a secure connection at the turn signal socket, or resetting the vehicle's body control module.
5. Can OBDII code B3951 GMC cause any safety concerns with the right rear turn signal?
- Yes, a malfunctioning right rear turn signal can compromise the visibility of your vehicle to other drivers, potentially leading to hazardous situations on the road. It is essential to address this issue promptly.
6. Is it possible to reset OBDII code B3951 GMC for the Right Rear Turn Signal Circuit without repairs?
- Resetting the code without addressing the underlying issue may temporarily clear the fault code, but the problem will likely reoccur until the root cause is fixed. It is recommended to diagnose and fix the issue to prevent further issues.
7. How do I know if the OBDII code B3951 GMC for the Right Rear Turn Signal Circuit has been successfully resolved?
- After making the necessary repairs, you can use a diagnostic scan tool to clear the fault codes from the vehicle's system. Then, test the right rear turn signal to ensure it functions correctly without triggering the code again.
8. Can extreme weather conditions affect the right rear turn signal circuit and trigger OBDII code B3951 GMC?
- Yes, extreme weather conditions like heavy rain, snow, or extreme temperatures can potentially damage the wiring or components in the right rear turn signal circuit, leading to the triggering of OBDII code B3951 GMC.
9. Are there any recalls or service bulletins related to OBDII code B3951 GMC for the Right Rear Turn Signal Circuit?
- It's advisable to check with the manufacturer or authorized service centers for any recalls or service bulletins related to this specific OBDII code to see if there are known issues or remedies available.
10. Can a DIY enthusiast with basic automotive knowledge fix OBDII code B3951 GMC for the Right Rear Turn Signal Circuit?
- Depending on the specific cause of the issue, a DIY enthusiast with basic automotive knowledge may be able to address simple fixes like bulb replacement or checking connections. However, more complex issues may require professional diagnosis and repair.
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