AutoCodes – Chevrolet – B3884 2017 Chevrolet Silverado

B3884 2017 Chevrolet Silverado 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 2017 Chevrolet Silverado 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 210

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 2017 Chevrolet Silverado 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 2017 Chevrolet Silverado - Center High Mounted Stop Lamp Circuit - AutoCodes.com — B3884 2017 Chevrolet Silverado Code - Center High Mounted Stop Lamp Circuit

What does this mean?

What are the Possible Causes of the DTC B3884 2017 Chevrolet Silverado?

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 2017 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

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 2017 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.

Need more information about the B3884 2017 Chevrolet Silverado code?

Need more information on how to fix the B3884 2017 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 2017 Chevrolet Silverado Code

1. What does OBDII code B3884 on a 2017 Chevrolet Silverado indicate?

- OBDII code B3884 on a 2017 Chevrolet Silverado refers to a fault in the Center High Mounted Stop Lamp Circuit.

2. What are the common symptoms of OBDII code B3884 in a 2017 Chevrolet Silverado?

- Common symptoms include the center high-mounted stop lamp not functioning properly, or the lamp staying on continuously.

3. What are the possible causes of OBDII code B3884 on a 2017 Chevrolet Silverado?

- The code could be triggered by issues such as a faulty center high-mounted stop lamp, damaged wiring, a defective lamp control module, or a blown fuse.

4. How can I diagnose the Center High Mounted Stop Lamp Circuit issue causing OBDII code B3884 on my 2017 Chevrolet Silverado?

- Diagnose the problem by visually inspecting the stop lamp, checking the wiring for damage, testing the lamp control module, and verifying fuse integrity.

5. Can I repair OBDII code B3884 in my 2017 Chevrolet Silverado myself?

- Depending on your skills and tools, you may be able to repair the issue yourself by replacing the faulty stop lamp, repairing damaged wiring, or addressing any other identified problems.

6. Is it safe to continue driving my 2017 Chevrolet Silverado with OBDII code B3884 present?

- It is not advisable to drive with this issue unresolved, as the center high-mounted stop lamp is an important safety feature that alerts other drivers when you brake.

7. How much does it typically cost to repair OBDII code B3884 in a 2017 Chevrolet Silverado?

- The repair cost can vary based on the exact cause of the issue, but it may involve expenses for parts and labor, with a potential range of $50 to $200 or more.

8. Can resetting the OBDII codes clear B3884 in a 2017 Chevrolet Silverado?

- Resetting the codes may temporarily clear the error, but if the underlying issue causing code B3884 is not fixed, the code will likely reappear upon detection of the fault.

9. Will OBDII code B3884 affect the overall performance of my 2017 Chevrolet Silverado?

- While the code itself may not directly impact performance, it is crucial to address the underlying problem to ensure the proper functioning of the center high-mounted stop lamp.

10. How long does it typically take to repair OBDII code B3884 on a 2017 Chevrolet Silverado?

- The repair time can vary depending on the extent of the issue and the repair process involved, but it may take anywhere from 30 minutes to a few hours to address the problem effectively.