AutoCodes – Generic – B2145

B2145 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: B2145 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.

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Code Popularity 3,908

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 B2145 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 B2145 - Outside Rearview Mirror Position Sensor Input Voltage High - AutoCodes.com — B2145 Code - Outside Rearview Mirror Position Sensor Input Voltage High

What does this mean?

What are the Possible Causes of the DTC B2145?

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 B2145?

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 B2145 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 B2145 code?

Need more information on how to fix the B2145 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2145 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2145 Buick — Outside Rearview Mirror Position Sensor Input Voltage High
B2145 Cadillac — Outside Rearview Mirror Position Sensor Input Voltage High
B2145 Chevrolet — Outside Rearview Mirror Position Sensor Input Voltage High
B2145 GMC — Outside Rearview Mirror Position Sensor Input Voltage High

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 B2145 Code

1. What are the common symptoms of OBDII code B2145?

The common symptoms of OBDII code B2145, Outside Rearview Mirror Position Sensor Input Voltage High, include erratic movement or failure of the outside rearview mirrors.

2. What are the possible causes of OBDII code B2145?

Possible causes of code B2145 include a malfunctioning mirror position sensor, wiring issues, a faulty mirror control module, or a problem with the mirror adjustment switch.

3. How can I diagnose OBDII code B2145?

Diagnosing code B2145 involves using a scan tool to retrieve the code, checking the mirror position sensor and wiring for damage, testing the mirror control module, and verifying the mirror adjustment switch functionality.

4. How serious is OBDII code B2145?

While code B2145 may not affect the overall drivability of the vehicle, it can lead to inconvenience and safety concerns due to the inability to properly adjust the outside rearview mirrors.

5. Can I continue driving with OBDII code B2145?

It is not recommended to continue driving with code B2145, as it may compromise visibility and safety while on the road. It is best to address the issue promptly.

6. How can OBDII code B2145 be repaired?

Repairing code B2145 involves fixing or replacing the faulty mirror position sensor, repairing any damaged wiring, replacing the mirror control module if needed, or addressing any issues with the mirror adjustment switch.

7. Can I reset OBDII code B2145 without fixing the underlying issue?

Resetting the code without addressing the underlying issue will only temporarily clear the fault code. The issue will persist, and the code is likely to return until the problem is fixed.

8. Is OBDII code B2145 a common issue in vehicles?

Code B2145 is a relatively common issue in vehicles equipped with outside rearview mirror position sensors, especially in older vehicles or those with high mileage.

9. Are there any DIY repair tips for OBDII code B2145?

DIY enthusiasts can attempt to inspect the mirror position sensor and wiring for damage, clean or reseat connectors, or replace the mirror adjustment switch as potential DIY repair tips for code B2145.

10. How much does it cost to repair OBDII code B2145 at a professional mechanic?

The cost of repairing OBDII code B2145 at a professional mechanic can vary depending on the specific cause of the issue, parts needed, and labor costs. It is advisable to obtain quotes from different mechanics for comparison.