AutoCodes – Chevrolet – B0984 Chevrolet

B0984 Chevrolet Code - Left Headlamp Light Distribution Shutter Control Circuit Malfunction

Quick Answer

Battery positive voltage is applied to the headlamp control module at all times. Common causes include Faulty Left Headlamp Assembly, Left Headlamp Assembly harness is open or shorted, Left Headlamp Assembly 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: B0984 Chevrolet indicates Left Headlamp Light Distribution Shutter Control Circuit Malfunction.
Common causes: Common causes include Faulty Left Headlamp Assembly, Left Headlamp Assembly harness is open or shorted, Left Headlamp Assembly 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 981

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 Mar 11, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B0984 Chevrolet Description

Battery positive voltage is applied to the headlamp control module at all times. The headlamp control module has a normal operational voltage range of about 12.5-16 V and is only fully functional with the ignition switch is in the RUN position and the headlamp switch in the AUTO position. The communications enable signal from the Body Control Module (BCM) wakes the headlamp control module microprocessor. The headlamp control module receives serial data messages from the Engine Control Module (ECM), Transmission Control Module (TCM), Electronic Brake Control Module (EBCM), and BCM with information regarding power mode, speed, steering angle, transmission gear selection, and headlamp switch status. The headlamp control module calculates the headlamp angle and sends commands to the left and right adaptive forward lighting system headlamp actuators. The headlamp actuators drive the headlamps to the position commanded by the headlamp control module. The headlamp control module monitors the headlamp actuator motor control circuits for proper circuit continuity and for shorts to ground or voltage. If a malfunction is detected, a DTC will be stored in memory and the driver will be notified with a message displayed over the driver information center located on the instrument cluster.

OBDII Code B0984 Chevrolet - Left Headlamp Light Distribution Shutter Control Circuit Malfunction - AutoCodes.com — B0984 Chevrolet Code - Left Headlamp Light Distribution Shutter Control Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC B0984 Chevrolet?

Faulty Left Headlamp Assembly
Left Headlamp Assembly harness is open or shorted
Left Headlamp Assembly circuit poor electrical connection

How to Fix the DTC B0984 Chevrolet?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0984 Chevrolet 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 B0984 Chevrolet code?

Need more information on how to fix the B0984 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0984 Chevrolet code diagnosed by a professional: Find a repair shop in your area

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 B0984 Chevrolet Code

1. What are common symptoms of OBDII code B0984 in a Chevrolet related to the left headlamp light distribution shutter control circuit malfunction?

- Common symptoms may include the left headlamp not functioning properly, erratic headlight beam patterns, or a warning light on the dashboard.

2. What could cause the OBDII code B0984 in a Chevrolet indicating a malfunction in the left headlamp light distribution shutter control circuit?

- Possible causes may include a faulty light distribution shutter control module, damaged wiring or connectors, or an issue with the headlamp assembly itself.

3. How can I diagnose the OBDII code B0984 in a Chevrolet for the left headlamp light distribution shutter control circuit malfunction?

- Diagnosing this code may involve using a scan tool to retrieve the specific fault codes, visually inspecting the headlamp assembly and related components, and testing the circuit for continuity and proper voltage.

4. Are there any DIY repair tips for addressing the OBDII code B0984 related to the left headlamp light distribution shutter control circuit malfunction in a Chevrolet?

- DIY repair tips may include checking and repairing any damaged wiring or connectors, replacing the faulty light distribution shutter control module, or ensuring proper alignment of the headlamp assembly.

5. Is it safe to continue driving with the OBDII code B0984 indicating a left headlamp light distribution shutter control circuit malfunction in a Chevrolet?

- It is not recommended to drive with this code present, as it can affect the proper functioning of the headlamp, potentially compromising visibility and safety while driving at night or in low-light conditions.

6. Can resetting the OBDII system clear the B0984 code related to the left headlamp light distribution shutter control circuit malfunction in a Chevrolet?

- Resetting the OBDII system may temporarily clear the code, but unless the underlying issue is addressed and repaired, the code is likely to reappear upon further diagnostics or driving.

7. How much can it cost to repair the OBDII code B0984 for the left headlamp light distribution shutter control circuit malfunction in a Chevrolet?

- Repair costs can vary depending on the specific cause of the issue, but they may range from a few hundred to over a thousand dollars, including parts and labor.

8. Can extreme weather conditions or environmental factors contribute to triggering the OBDII code B0984 in a Chevrolet for the left headlamp light distribution shutter control circuit malfunction?

- Yes, extreme weather conditions, such as moisture or exposure to harsh elements, can potentially damage the headlamp components and wiring, leading to the malfunction indicated by the B0984 code.