AutoCodes – Buick – B2143 Buick

B2143 Buick Code - Outside Rearview Mirror Reached Limit Of Travel

Quick Answer

Outside rearview mirror switch supplies inputs to Memory Mirror Module (MMM) to drive outside rearview mirrors horizontal and vertical motors. Common causes include Faulty Outside Rearview Mirror Switch, Outside Rearview Mirror Switch harness is open or shorted, Outside Rearview Mirror Switch 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
B2143 Buick indicates Outside Rearview Mirror Reached Limit Of Travel.
Common causes
Common causes include Faulty Outside Rearview Mirror Switch, Outside Rearview Mirror Switch harness is open or shorted, Outside Rearview Mirror Switch 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 518
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Sep 19, 2019
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Code B2143 Buick Description

Outside rearview mirror switch supplies inputs to Memory Mirror Module (MMM) to drive outside rearview mirrors horizontal and vertical motors. Outside rearview mirror switch must be in either L or R position in order to operate outside rearview mirror. When outside rearview mirror switch is actuated, the battery voltage input signal and the ground input signal is sent to MMM. When MMM recognizes input combination, it moves the appropriate mirror to the requested direction. If MMM does not recognize input combination as a valid input, it ignores combination and does not move outside rearview mirror.
OBDII Code B2143 Buick - Outside Rearview Mirror Reached Limit Of Travel - AutoCodes.com
B2143 Buick Code - Outside Rearview Mirror Reached Limit Of Travel

What are the Possible Causes of the DTC B2143 Buick?

  • Faulty Outside Rearview Mirror Switch
  • Outside Rearview Mirror Switch harness is open or shorted
  • Outside Rearview Mirror Switch circuit poor electrical connection
  • Faulty Memory Mirror Module (MMM)

How to Fix the DTC B2143 Buick?

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 B2143 Buick 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 B2143 Buick code?

Need more information on how to fix the B2143 Buick code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2143 Buick 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 B2143 Buick Code

1. What are the common symptoms of OBDII code B2143 in a Buick related to the outside rearview mirror reaching the limit of travel?

- The common symptoms include the outside rearview mirror being unable to adjust properly or move to its intended position.

2. What are some possible causes of OBDII code B2143 in a Buick triggering the outside rearview mirror limit of travel issue?

- Possible causes may include a faulty mirror motor, damaged mirror mechanism, wiring issues, or a malfunctioning mirror control switch.

3. How can I diagnose the OBDII code B2143 in a Buick for the outside rearview mirror problem?

- Diagnosis involves checking the mirror motor operation, inspecting the mirror movement, testing the mirror control switch, and examining the wiring for any faults.

4. What are the repair options for resolving the OBDII code B2143 in a Buick due to the outside rearview mirror reaching its travel limit?

- Repair options may involve replacing the mirror motor, fixing the mirror mechanism, repairing any wiring issues, or replacing the mirror control switch as needed.

5. Is it safe to drive my Buick with the OBDII code B2143 related to the outside rearview mirror issue?

- While the vehicle is safe to drive with this code, it's recommended to address the mirror problem promptly for convenience and safety while driving.

6. Can resetting the OBDII code B2143 in a Buick solve the outside rearview mirror limit of travel problem?

- Resetting the code may temporarily clear the warning, but it's essential to address the root cause of the mirror issue to prevent the code from reoccurring.

7. Are there any DIY tips for fixing the OBDII code B2143 affecting the outside rearview mirror in a Buick?

- DIY tips may include checking for loose connections, ensuring the mirror is not obstructed, and testing the mirror functions before considering professional repair.

8. How long does it typically take to repair the OBDII code B2143 in a Buick related to the outside rearview mirror issue?

- Repair time can vary based on the specific cause of the problem, but it may take anywhere from 30 minutes to a few hours for diagnosis and repair.

9. Can extreme weather conditions impact the OBDII code B2143 triggering the outside rearview mirror limit of travel in a Buick?

- Extreme weather conditions, such as excessive heat or cold, can potentially affect the mirror motor or mechanism, leading to the mirror reaching its travel limit.

10. Should I seek professional help for fixing the OBDII code B2143 in a Buick concerning the outside rearview mirror issue?

- It's advisable to consult a qualified mechanic or dealership to accurately diagnose and repair the mirror problem associated with the OBDII code B2143 for optimal results.

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