AutoCodes – Chevrolet – B2140 Chevrolet

B2140 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: B2140 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 522

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 B2140 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 B2140 Chevrolet - Outside Rearview Mirror Reached Limit Of Travel - AutoCodes.com — B2140 Chevrolet Code - Outside Rearview Mirror Reached Limit Of Travel

What does this mean?

What are the Possible Causes of the DTC B2140 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 B2140 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 B2140 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 B2140 Chevrolet Code

What does the OBDII code B2140 mean for my Chevrolet?

The B2140 code indicates that the outside rearview mirror has reached its maximum travel limit, which may affect its ability to adjust properly.

What are common symptoms of the B2140 code?

Common symptoms include the outside rearview mirror not moving when adjusted, or it may be stuck in one position.

What could cause the B2140 code to trigger?

The code can be triggered by a malfunctioning mirror motor, a faulty mirror switch, wiring issues, or a problem with the body control module.

Is it safe to drive a vehicle with the B2140 code?

While it may not affect the vehicle's overall drivability, it's advisable to address the issue, as not having functional mirrors can pose safety risks.

How can I diagnose the B2140 code?

To diagnose the B2140 code, you can use an OBDII scanner to confirm the code and then check the mirror motor, wiring, and switch for faults.

What repair steps can I take if I have the B2140 code?

You can start by inspecting the wiring and connections to the mirror, testing the mirror motor and switch, and replacing any faulty components.

Can I reset the B2140 code after repairs?

Yes, you can reset the code using an OBDII scanner after making the necessary repairs. However, ensure the issue is resolved to prevent the code from returning.

Will the B2140 code affect my vehicle's performance?

No, the B2140 code does not typically affect the engine performance but can impact visibility and safety.

How much does it usually cost to fix the B2140 code?

Repair costs can vary widely depending on the cause, but expect to spend anywhere from $50 to $300 for parts and labor, depending on whether you need to replace the mirror motor or other components.