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Engine-Codes – Chevrolet – B3951 2018 Chevrolet Silverado

B3951 2018 Chevrolet Silverado Code - Right Rear Turn Signal Circuit

Quick Answer

The B3951 code on a 2018 Chevrolet Silverado specifically relates to an issue with the right rear turn signal circuit. Common causes include Burnt out turn signal bulb, Damaged wiring or connector in the turn signal circuit, Faulty turn signal switch. 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 2018 Chevrolet Silverado indicates Right Rear Turn Signal Circuit.
Common causes
Common causes include Burnt out turn signal bulb, Damaged wiring or connector in the turn signal circuit, Faulty turn signal switch.
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 08, 2024
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Code B3951 2018 Chevrolet Silverado Description

The B3951 code on a 2018 Chevrolet Silverado specifically relates to an issue with the right rear turn signal circuit. This code indicates that there is a malfunction or fault in the electrical system that controls the right rear turn signal on the vehicle. The turn signal circuit is a crucial component of the vehicle's lighting system, as it alerts other drivers of your intention to turn or change lanes.

OBDII Code B3951 2018 Chevrolet Silverado - Right Rear Turn Signal Circuit
B3951 2018 Chevrolet Silverado Code - Right Rear Turn Signal Circuit

Common Causes of B3951 2018 Chevrolet Silverado

  1. Burnt out turn signal bulb
  2. Damaged wiring or connector in the turn signal circuit
  3. Faulty turn signal switch
  4. Issue with the body control module
  5. Corrosion in the electrical connections

Symptoms of B3951 2018 Chevrolet Silverado

  1. Right rear turn signal not working
  2. Rapid flashing of the right rear turn signal
  3. Error message on the instrument panel related to the turn signal
  4. Dim or flickering right rear turn signal

How to Fix B3951 2018 Chevrolet Silverado

  1. Begin by visually inspecting the right rear turn signal bulb to check for any signs of damage or burnt out elements. Replace the bulb if necessary.
  2. Inspect the wiring harness and connectors in the turn signal circuit for any visible damage or corrosion. Repair or replace any damaged components.
  3. Test the turn signal switch to ensure it is functioning correctly. Replace the switch if it is faulty.
  4. If the issue persists, check the body control module for any error codes related to the turn signal circuit. Reset or replace the module if needed.
  5. Finally, test the right rear turn signal to ensure it is working properly after completing the repairs.

Cost to Fix B3951 2018 Chevrolet Silverado

The typical repair costs for addressing a B3951 code on a 2018 Chevrolet Silverado can vary depending on the specific cause of the issue. In general, the cost of replacing a turn signal bulb can range from $5 to $20, while repairing wiring harnesses or connectors may cost between $50 and $200. Replacing a turn signal switch or body control module can be more expensive, with costs ranging from $100 to $500 or more. Labor costs can also add to the overall repair bill, with rates typically ranging from $80 to $150 per hour. It's advisable to consult with a qualified mechanic to get an accurate estimate based on the specific diagnosis and repair needed for your vehicle.

What does this mean?

Tech Notes for B3951 2018 Chevrolet Silverado

B3951:01 Right Rear Turn Signal Circuit Short to Battery
B3951:02 Right Rear Turn Signal Circuit Short to Ground
B3951:04 Right Rear Turn Signal Circuit Open

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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 B3951 2018 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code B3951 in a 2018 Chevrolet Silverado related to the right rear turn signal circuit?

The common symptoms include a non-functioning or rapidly blinking right rear turn signal, as well as a dashboard warning light indicating a turn signal issue.

2. What are some possible causes of OBDII code B3951 in a 2018 Chevrolet Silverado?

Possible causes of code B3951 could be a faulty right rear turn signal bulb, a damaged wiring harness, a malfunctioning turn signal relay, or a problem with the vehicle's body control module.

3. How can I diagnose the right rear turn signal circuit issue in my 2018 Chevrolet Silverado?

To diagnose the issue, start by visually inspecting the right rear turn signal bulb for damage. Next, check the wiring connections for any loose or corroded connections. Using a multimeter, test the voltage at the bulb socket to ensure power is reaching the bulb.

4. Is it safe to continue driving with OBDII code B3951 in a 2018 Chevrolet Silverado?

While it may be safe to drive with a non-functioning right rear turn signal during the day, it is crucial to get the issue resolved promptly to ensure proper signaling at night or in low visibility conditions.

5. Can I repair OBDII code B3951 in a 2018 Chevrolet Silverado myself?

Depending on your level of automotive expertise, you may be able to replace the right rear turn signal bulb or repair minor wiring issues yourself. However, more complex issues may require professional diagnosis and repair.

6. How much does it typically cost to repair OBDII code B3951 in a 2018 Chevrolet Silverado?

The cost of repairing code B3951 can vary widely depending on the root cause of the issue. Simple fixes like replacing a bulb may cost under $20, while more complex repairs involving the wiring harness or control module could cost several hundred dollars.

7. Will resetting the OBDII system clear code B3951 in a 2018 Chevrolet Silverado?

Resetting the OBDII system may temporarily clear the code, but it will likely reappear if the underlying issue with the right rear turn signal circuit is not addressed and resolved.

8. How long does it take to repair OBDII code B3951 in a 2018 Chevrolet Silverado?

The repair time for code B3951 can vary depending on the specific cause of the issue. Simple fixes like replacing a bulb can be done in minutes, while more complex repairs may take several hours or even a full day.

9. Can extreme weather conditions affect OBDII code B3951 in a 2018 Chevrolet Silverado?

Extreme weather conditions, such as heavy rain or snow, can potentially exacerbate issues with the right rear turn signal circuit by causing corrosion or short circuits in the wiring. It is essential to address any issues promptly to prevent further damage.

10. Are there any recalls or technical service bulletins related to OBDII code B3951 in a 2018 Chevrolet Silverado?

It's recommended to check with a Chevrolet dealership or the manufacturer's website for any recalls or technical service bulletins related to code B3951 in a 2018 Silverado. This information may provide insights into common issues and potential solutions for this specific problem.

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