AutoCodes – Chevrolet – B2143 Chevrolet

B2143 Chevrolet 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 Chevrolet 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.

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Code Popularity 553

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 Sep 19, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2143 Chevrolet 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 Chevrolet - Outside Rearview Mirror Reached Limit Of Travel - AutoCodes.com — B2143 Chevrolet Code - Outside Rearview Mirror Reached Limit Of Travel

What does this mean?

What are the Possible Causes of the DTC B2143 Chevrolet?

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 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 B2143 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.

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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 B2143 Chevrolet Code

1. What does the OBDII code B2143 mean for a Chevrolet?

B2143 indicates that the outside rearview mirror has reached its limit of travel, meaning the mirror motor is trying to move beyond its physical range.

2. What are the common symptoms of code B2143 on a Chevrolet?

Symptoms may include the mirror not adjusting properly, unusual noises from the mirror motor, or no response when using the mirror adjustment controls.

3. What causes the B2143 code to appear in a Chevrolet?

The code is typically caused by a faulty mirror motor, misaligned mirror components, broken internal mirror mechanisms, or a damaged wiring harness.

4. Can I still drive my Chevrolet with the B2143 code?

Yes, the vehicle is safe to drive, but the outside mirror adjustment may not function correctly, potentially affecting visibility and safety.

5. How do I diagnose the B2143 code on a Chevrolet?

Diagnosis involves visually inspecting the mirror for damage, testing the mirror motor and wiring, and using a scan tool to verify the code and clear it after repairs.

6. How can I fix the B2143 code on my Chevrolet?

Fixes may include replacing the mirror motor, repairing damaged wiring, realigning the mirror assembly, or replacing the entire mirror if necessary.

7. Does the B2143 code always require mirror replacement on a Chevrolet?

No, sometimes the issue can be resolved with simpler repairs, such as fixing wiring or resetting the mirrorâ€™s position.

8. Can a software issue cause the B2143 code on a Chevrolet?

In rare cases, a software glitch in the body control module (BCM) may contribute to the issue, requiring a module reset or update.

9. How much does it cost to repair the B2143 code on a Chevrolet?

Repair costs vary; minor wiring repairs may cost under $100, while replacing the mirror assembly could cost $200â€“$500 or more, depending on the model and labor rates.

10. Will clearing the B2143 code with a scan tool fix the problem permanently?

Clearing the code may temporarily reset the system, but the underlying mechanical or electrical issue must be addressed to prevent the code from returning.