B3950 2017 GMC Sierra Code - Left Rear Turn Signal Circuit
Quick Answer
Ground is applied at all times to the turn signal/multifunction switch. Common causes include Faulty Left Rear Turn Signal Lamp, Left Rear Turn Signal Lamp harness is open or shorted, Left Rear Turn Signal Lamp circuit poor electrical connection. 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
- B3950 2017 GMC Sierra indicates Left Rear Turn Signal Circuit.
- Common causes
- Common causes include Faulty Left Rear Turn Signal Lamp, Left Rear Turn Signal Lamp harness is open or shorted, Left Rear Turn Signal Lamp circuit poor electrical connection.
- 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.
Code B3950 2017 GMC Sierra Description
What are the Possible Causes of the DTC B3950 2017 GMC Sierra?
- Faulty Left Rear Turn Signal Lamp
- Left Rear Turn Signal Lamp harness is open or shorted
- Left Rear Turn Signal Lamp circuit poor electrical connection
How to Fix the DTC B3950 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.
Code Tech Notes
B3950:02 Left Rear Turn Signal Circuit Short to Ground
B3950:04 Left Rear Turn Signal Circuit Open
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B3950 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 B3950 2017 GMC Sierra code?
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Frequently Asked Questions about B3950 2017 GMC Sierra Code
1. What are the common symptoms of OBDII code B3950 on a 2017 GMC Sierra related to the Left Rear Turn Signal Circuit?
The common symptoms include the left rear turn signal not functioning properly, such as blinking too quickly or not working at all.
2. What are the possible causes of OBDII code B3950 on a 2017 GMC Sierra Left Rear Turn Signal Circuit?
Potential causes include a burnt-out bulb, a faulty turn signal relay, a broken wiring connection, or a malfunctioning turn signal switch.
3. How can I diagnose the issue related to OBDII code B3950 on my 2017 GMC Sierra's Left Rear Turn Signal Circuit?
You can start by visually inspecting the left rear turn signal bulb, checking the fuse, examining the wiring for any damage, and testing the turn signal relay and switch.
4. Can I continue driving my 2017 GMC Sierra with OBDII code B3950 related to the Left Rear Turn Signal Circuit?
It is not recommended to drive with a malfunctioning turn signal as it poses a safety hazard. Get the issue diagnosed and repaired promptly.
5. How can I repair OBDII code B3950 on a 2017 GMC Sierra Left Rear Turn Signal Circuit?
Repair steps may include replacing the left rear turn signal bulb, repairing damaged wiring, replacing the turn signal relay or switch, or resetting the fault code after fixing the issue.
6. Is it possible for a loose connection to cause OBDII code B3950 on a 2017 GMC Sierra Left Rear Turn Signal Circuit?
Yes, a loose or corroded connection in the left rear turn signal circuit can cause the code to trigger. Ensure all connections are secure and free of corrosion.
7. Can extreme weather conditions affect the triggering of OBDII code B3950 on a 2017 GMC Sierra Left Rear Turn Signal Circuit?
Yes, extreme weather conditions like heavy rain or snow can impact the operation of the turn signal circuit, leading to issues triggering the OBDII code.
8. Will resetting the OBDII system clear OBDII code B3950 related to the Left Rear Turn Signal Circuit on a 2017 GMC Sierra?
Resetting the OBDII system may temporarily clear the code, but if the underlying issue is not fixed, the code is likely to reappear. It's essential to diagnose and repair the problem.
9. How can I prevent OBDII code B3950 from recurring on my 2017 GMC Sierra Left Rear Turn Signal Circuit after repair?
Regularly inspect and maintain the turn signal system, including checking bulbs, ensuring proper connections, and addressing any issues promptly to prevent the code from reoccurring.
10. Are there any specific tools or equipment recommended for diagnosing and repairing OBDII code B3950 on a 2017 GMC Sierra Left Rear Turn Signal Circuit?
Basic tools like a multimeter, electrical tape, replacement bulbs, and a wiring diagram for your vehicle can be helpful for diagnosing and repairing issues related to the Left Rear Turn Signal Circuit.
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