AutoCodes – Generic – B2144

B2144 Code - Outside Rearview Mirror Position Sensor Input Voltage Low

Quick Answer

The Memory Mirror Module (MMM) receives input 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: B2144 indicates Outside Rearview Mirror Position Sensor Input Voltage Low.
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.

Save to My Repairs My Repairs

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

Code Popularity 4,124

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
Add Comment

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

Code B2144 Description

The Memory Mirror Module (MMM) receives input 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 voltages across outside rearview mirrors. During memory recall, MMM moves outside rearview mirror motor 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 or vertical position sensor input voltage is less than 0.25 volts.

OBDII Code B2144 - Outside Rearview Mirror Position Sensor Input Voltage Low - AutoCodes.com — B2144 Code - Outside Rearview Mirror Position Sensor Input Voltage Low

What does this mean?

What are the Possible Causes of the DTC B2144?

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 B2144?

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 B2144 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 B2144 code?

Need more information on how to fix the B2144 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2144 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2144 Buick — Outside Rearview Mirror Position Sensor Input Voltage Low
B2144 Cadillac — Outside Rearview Mirror Position Sensor Input Voltage Low
B2144 Chevrolet — Outside Rearview Mirror Position Sensor Input Voltage Low
B2144 GMC — Outside Rearview Mirror Position Sensor Input Voltage Low

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 B2144 Code

1. What are the common symptoms of OBDII code B2144 (Outside Rearview Mirror Position Sensor Input Voltage Low)?

The common symptoms include malfunctioning power mirrors, inaccurate mirror positioning, and potential issues with mirror adjustment features.

2. What are the possible causes of OBDII code B2144?

The code B2144 can be triggered by a faulty outside rearview mirror position sensor, damaged wiring or connectors related to the sensor, or issues with the mirror motor.

3. How can I diagnose the cause of OBDII code B2144?

To diagnose the cause of B2144, you can start by inspecting the wiring and connectors for any damage or corrosion. Testing the mirror position sensor and motor for proper functionality using a multimeter can also help pinpoint the issue.

4. Can I repair OBDII code B2144 myself?

If you have experience with automotive electrical systems, you may be able to repair B2144 yourself by replacing the faulty mirror position sensor, repairing damaged wiring, or addressing any connector issues. However, if you're unsure, it's best to seek professional assistance.

5. Are there any temporary fixes for OBDII code B2144?

While there may be temporary fixes like resetting the error code with an OBDII scanner, it's important to address the root cause of B2144 to prevent further issues with your vehicle's mirror system.

6. Will OBDII code B2144 cause my power mirrors to stop working completely?

In some cases, OBDII code B2144 may cause the power mirrors to stop functioning properly due to the low input voltage from the mirror position sensor. It's essential to address the issue promptly to avoid complete mirror failure.

7. Can a damaged mirror motor trigger OBDII code B2144?

Yes, a damaged mirror motor can contribute to triggering code B2144, especially if it affects the sensor's ability to accurately detect the mirror's position.

8. Is it safe to drive with OBDII code B2144 present?

While it may be safe to drive with OBDII code B2144 present, it's best to address the issue as soon as possible to ensure proper functionality of your vehicle's mirror system.

9. How much does it typically cost to repair OBDII code B2144?

The cost of repairing OBDII code B2144 can vary depending on the exact cause of the issue, labor rates in your area, and whether you choose to repair it yourself or seek professional help. Costs may range from a simple sensor replacement to more extensive wiring repairs.

10. Can OBDII code B2144 affect other vehicle systems?

While OBDII code B2144 specifically relates to the outside rearview mirror position sensor, it's essential to address the issue promptly to prevent any potential impact on other vehicle systems that rely on accurate sensor inputs.