AutoCodes – Chevrolet – B2149 Chevrolet

B2149 Chevrolet Code - Outside Rearview Mirror Position Sensor Input Voltage High

Quick Answer

The Memory Mirror Module (MMM) receives inputs from mirror position sensors during these functions: memory recall, memory seat and easy exit. Common causes include Faulty Outside Rearview Mirror Motor, Outside Rearview Mirror Motor harness is open or shorted, Outside Rearview Mirror Motor 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
B2149 Chevrolet indicates Outside Rearview Mirror Position Sensor Input Voltage High.
Common causes
Common causes include Faulty Outside Rearview Mirror Motor, Outside Rearview Mirror Motor harness is open or shorted, Outside Rearview Mirror Motor 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 741
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 B2149 Chevrolet Description

The Memory Mirror Module (MMM) receives inputs from mirror position sensors during these functions: memory recall, memory seat and easy exit. Potentiometers in position sensors vary in resistance as motors move outside rearview mirror. MMM receives a variable voltage input depending on resistance of the potentiometer. During memory set, MMM records voltage across mirrors. During memory recall, MMM moves mirror motors until the voltage across each potentiometer matches recorded the voltage. During normal operation, mirror position sensors are checked against out-of-range limits. Outside rearview mirrors horizontal and vertical position sensor input voltage is 4.75 volts or more.
OBDII Code B2149 Chevrolet - Outside Rearview Mirror Position Sensor Input Voltage High - AutoCodes.com
B2149 Chevrolet Code - Outside Rearview Mirror Position Sensor Input Voltage High

What are the Possible Causes of the DTC B2149 Chevrolet?

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

How to Fix the DTC B2149 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 B2149 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 B2149 Chevrolet code?

Need more information on how to fix the B2149 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2149 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 B2149 Chevrolet Code

1. What are the common symptoms of OBDII code B2149 in a Chevrolet related to the outside rearview mirror position sensor input voltage being high?

- The common symptoms include erratic movement or failure of the outside rearview mirrors to adjust properly.

2. What could cause the outside rearview mirror position sensor input voltage to be high in a Chevrolet, triggering code B2149?

- Possible causes include a faulty mirror position sensor, damaged wiring or connectors, or a malfunctioning mirror adjustment switch.

3. How can I diagnose the OBDII code B2149 in my Chevrolet related to the outside rearview mirror position sensor?

- Diagnose the code by inspecting the mirror position sensor, checking the wiring and connectors for any damage, and testing the mirror adjustment switch for proper functionality.

4. Can I drive my Chevrolet safely with the OBDII code B2149 triggered due to the outside rearview mirror sensor issue?

- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to ensure proper mirror functionality.

5. What steps can I take to repair OBDII code B2149 in my Chevrolet caused by the high input voltage from the outside rearview mirror sensor?

- Repair steps may include replacing the faulty mirror position sensor, repairing damaged wiring or connectors, or addressing any issues with the mirror adjustment switch.

6. Will resetting the OBDII system clear the B2149 trouble code related to the outside rearview mirror sensor issue in my Chevrolet?

- Resetting the system may temporarily clear the code, but it is advisable to diagnose and repair the underlying issue to prevent the code from reoccurring.

7. Are there any DIY repair tips for fixing the OBDII code B2149 in a Chevrolet due to the outside rearview mirror sensor issue?

- DIY repair tips may include visually inspecting the sensor and wiring for damage, ensuring proper connections, and checking the mirror adjustment switch.

8. How can I prevent OBDII code B2149 from coming back in my Chevrolet after repairing the outside rearview mirror sensor issue?

- To prevent code recurrence, make sure to use quality replacement parts, follow proper repair procedures, and perform thorough testing after the repair.

9. Is it necessary to visit a dealership or mechanic to fix the OBDII code B2149 caused by the outside rearview mirror sensor in my Chevrolet?

- While it is possible to address the issue independently, seeking professional assistance from a dealership or mechanic may ensure accurate diagnosis and effective repair.

10. Can the OBDII code B2149 in my Chevrolet be a sign of other underlying electrical issues besides the outside rearview mirror sensor problem?

- While B2149 is specifically related to the mirror sensor input voltage, it is advisable to inspect the overall electrical system for any related issues that could be affecting the sensor's operation.

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