AutoCodes – Chevrolet – B3951 2016 Chevrolet Silverado

B3951 2016 Chevrolet Silverado Code - Right Rear Turn Signal Circuit

Quick Answer

Ground is applied at all times to the turn signal/multifunction switch. Common causes include Faulty Right Rear Turn Signal Lamp, Right Rear Turn Signal Lamp harness is open or shorted, Right 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: B3951 2016 Chevrolet Silverado indicates Right Rear Turn Signal Circuit.
Common causes: Common causes include Faulty Right Rear Turn Signal Lamp, Right Rear Turn Signal Lamp harness is open or shorted, Right 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.

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Code Popularity 263

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Basic DIY (1 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 17, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B3951 2016 Chevrolet Silverado Description

Ground is applied at all times to the turn signal/multifunction switch. The turn signal lamps may only be activated with the ignition switch in the ON or START positions. When the turn signal/multifunction switch is placed in either the TURN RIGHT or TURN LEFT position, ground is applied to the Body Control Module (BCM) through either the right turn or left turn signal switch signal circuit. The BCM responds to the turn signal switch input by applying a pulsating voltage to the front and rear turn signal lamps through there respective control circuits. When a turn signal request is received by the BCM, a serial data message is sent to the instrument cluster requesting the respective turn signal indicator be pulsed ON and OFF. The Diagnostic Trouble Code (DTC) will be set when the BCM detects a short to voltage, short to ground, or an open/high resistance in the right rear turn signal control circuit.

OBDII Code B3951 2016 Chevrolet Silverado - Right Rear Turn Signal Circuit - AutoCodes.com — B3951 2016 Chevrolet Silverado Code - Right Rear Turn Signal Circuit

What does this mean?

What are the Possible Causes of the DTC B3951 2016 Chevrolet Silverado?

Faulty Right Rear Turn Signal Lamp
Right Rear Turn Signal Lamp harness is open or shorted
Right Rear Turn Signal Lamp circuit poor electrical connection

How to Fix the DTC B3951 2016 Chevrolet Silverado?

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 does this mean?

Code Tech Notes

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B3951 2016 Chevrolet Silverado 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.

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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 2016 Chevrolet Silverado Code

1. What does the OBDII code B3951 mean on a 2016 Chevrolet Silverado?

The code B3951 refers to a fault in the right rear turn signal circuit, indicating an issue with the signal's wiring, bulb, or related components.

2. What are the common symptoms of code B3951 in a 2016 Chevrolet Silverado?

Symptoms include the right rear turn signal not working, rapid blinking of the turn signal indicator, or a dashboard warning message.

3. What causes the B3951 code to appear on a 2016 Chevrolet Silverado?

Common causes include a burned-out bulb, damaged wiring, a faulty socket, or a malfunctioning body control module (BCM).

4. Can a burned-out bulb trigger the B3951 code in my Silverado?

Yes, a burned-out right rear turn signal bulb is a common reason for this code to appear.

5. How do I diagnose the B3951 code on my 2016 Chevrolet Silverado?

Start by inspecting the right rear turn signal bulb and socket, check for damaged or corroded wiring, and use a scan tool to verify the fault.

6. Is it safe to drive my 2016 Chevrolet Silverado with a B3951 code?

While the vehicle may still be drivable, the malfunctioning turn signal poses a safety risk and should be repaired immediately.

7. How do I fix the B3951 code on a 2016 Chevrolet Silverado?

Replace the right rear turn signal bulb if it's burned out, repair any damaged wiring, clean corroded connections, or replace the socket if necessary.

8. Can a faulty body control module (BCM) cause the B3951 code?

Yes, a malfunctioning BCM can occasionally cause this issue, but it is less common and should be checked only after ruling out simpler causes.

9. How much does it cost to repair the B3951 code on a 2016 Chevrolet Silverado?

The cost depends on the specific issue but typically ranges from $10 for a bulb replacement to $100-$300 for wiring or socket repairs. BCM replacement costs are higher.

10. Can I clear the B3951 code without fixing the issue?

You can clear the code with a scan tool, but it will likely return until the underlying problem is resolved.