AutoCodes – GMC – B3884 2014 GMC Sierra

B3884 2014 GMC Sierra Code - Center High Mounted Stop Lamp Circuit

Quick Answer

The brake pedal position sensor is used to sense the action of the driver's application of the brake pedal. Common causes include Faulty Center High Mounted Stop Lamp, Center High Mounted Stop Lamp harness is open or shorted, Center High Mounted Stop 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: B3884 2014 GMC Sierra indicates Center High Mounted Stop Lamp Circuit.
Common causes: Common causes include Faulty Center High Mounted Stop Lamp, Center High Mounted Stop Lamp harness is open or shorted, Center High Mounted Stop 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 162

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 16, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B3884 2014 GMC Sierra Description

The brake pedal position sensor is used to sense the action of the driver's application of the brake pedal. The brake pedal position sensor provides an analog voltage signal that will increase as the brake pedal is applied. The Body Control Module (BCM) provides a low reference signal and a 5 V reference voltage to the brake pedal position sensor. When the variable signal reaches a voltage threshold indicating the brakes have been applied, the BCM energizes the stop lamp relay by applying a voltage to the stop lamp relay control circuit. When the stop lamp relay is energized, the relay switch contacts close, and battery voltage is applied to the Center High Mounted Stop Lamp (CHMSL) control circuit which illuminates the CHMSL. The Diagnostic Trouble Code (DTC) will be set when the BCM detects a malfunction in the stop lamp relay control circuit.

OBDII Code B3884 2014 GMC Sierra - Center High Mounted Stop Lamp Circuit - AutoCodes.com — B3884 2014 GMC Sierra Code - Center High Mounted Stop Lamp Circuit

What does this mean?

What are the Possible Causes of the DTC B3884 2014 GMC Sierra?

Faulty Center High Mounted Stop Lamp
Center High Mounted Stop Lamp harness is open or shorted
Center High Mounted Stop Lamp circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B3884 2014 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.

What does this mean?

Code Tech Notes

B3884:01 Center High Mounted Stop Lamp Circuit Short to Battery
B3884:02 Center High Mounted Stop Lamp Circuit Short to Ground
B3884:04 Center High Mounted Stop Lamp Circuit Open

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B3884 2014 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 B3884 2014 GMC Sierra code?

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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 B3884 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code B3884 in a 2014 GMC Sierra related to the Center High Mounted Stop Lamp Circuit?

- The common symptoms include the center high-mounted stop lamp not working, the brake lights not functioning properly, or dashboard warning lights indicating a fault.

2. What are the possible causes of OBDII code B3884 in a 2014 GMC Sierra?

- The code B3884 may be triggered by a faulty center high-mounted stop lamp, damaged wiring or connectors, a blown fuse, or a malfunctioning brake light switch.

3. How can I diagnose the issue causing OBDII code B3884 in my 2014 GMC Sierra?

- You can start by visually inspecting the center high-mounted stop lamp, checking the wiring and connectors for damage, testing the brake light switch, and using a diagnostic scanner to read the fault codes.

4. What are some repair tips for fixing OBDII code B3884 in a 2014 GMC Sierra?

- Repair tips include replacing the faulty center high-mounted stop lamp, repairing or replacing damaged wiring or connectors, checking and replacing any blown fuses, and testing or replacing the brake light switch if needed.

5. Can I continue driving my 2014 GMC Sierra with OBDII code B3884 triggered?

- It is not recommended to continue driving with the code B3884 triggered, as it indicates a potential issue with the brake lights, which are crucial for safety on the road.

6. How much does it typically cost to repair OBDII code B3884 in a 2014 GMC Sierra?

- The cost of repairing OBDII code B3884 can vary depending on the specific cause of the issue, but it may range from $50 for a simple fix like replacing a fuse to a few hundred dollars for more complex repairs involving wiring or components.

7. Can I reset OBDII code B3884 in my 2014 GMC Sierra without fixing the underlying issue?

- While you can clear the fault code using an OBDII scanner, it is important to address the underlying issue causing the code to prevent potential safety hazards and ensure the proper functioning of the brake lights.

8. Is OBDII code B3884 in a 2014 GMC Sierra a common issue?

- OBDII code B3884 related to the Center High Mounted Stop Lamp Circuit is not extremely common, but it can occur due to various factors like component failure, wiring issues, or electrical faults.

9. Are there any recalls or technical service bulletins related to OBDII code B3884 in a 2014 GMC Sierra?

- It is recommended to check with a GMC dealership or visit the National Highway Traffic Safety Administration's website to see if there are any recalls or technical service bulletins related to OBDII code B3884 in a 2014 GMC Sierra.

10. Can a DIY enthusiast with basic automotive knowledge repair OBDII code B3884 in a 2014 GMC Sierra?

- Depending on the specific cause of the issue, a DIY enthusiast with basic automotive knowledge may be able to address simpler fixes like replacing a fuse or the center high-mounted stop lamp. However, more complex wiring or component repairs may require professional assistance.