AutoCodes – GMC – B2145 GMC

B2145 GMC 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 GMC 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 549
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 B2145 GMC 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 GMC - Outside Rearview Mirror Position Sensor Input Voltage High - AutoCodes.com
B2145 GMC Code - Outside Rearview Mirror Position Sensor Input Voltage High

What are the Possible Causes of the DTC B2145 GMC?

  • 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 GMC?

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 GMC 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 GMC code?

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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 B2145 GMC Code

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

The common symptoms of OBDII code B2145 GMC, which indicates an 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 GMC?

Possible causes of OBDII code B2145 GMC include a faulty outside rearview mirror position sensor, damaged wiring or connectors in the mirror system, or issues with the mirror control module.

3. How can I diagnose the OBDII code B2145 GMC at home?

To diagnose OBDII code B2145 GMC at home, you can start by visually inspecting the outside rearview mirrors and their wiring for any visible damage. You can also use an OBDII scanner to read and clear the code to see if it returns.

4. Can I drive my vehicle with OBDII code B2145 GMC?

It is generally safe to drive your vehicle with OBDII code B2145 GMC, but you may experience issues with the control and adjustment of your outside rearview mirrors.

5. How can I repair OBDII code B2145 GMC?

To repair OBDII code B2145 GMC, you may need to replace the faulty outside rearview mirror position sensor, repair any damaged wiring or connectors, or replace the mirror control module if necessary.

6. Can weather conditions affect OBDII code B2145 GMC?

Extreme weather conditions, such as heavy rain or snow, can potentially damage the outside rearview mirror components and contribute to triggering OBDII code B2145 GMC.

7. Is OBDII code B2145 GMC a common issue in GMC vehicles?

OBDII code B2145 GMC related to the Outside Rearview Mirror Position Sensor Input Voltage High may occur in some GMC vehicles with advanced mirror control systems.

8. How long does it usually take to repair OBDII code B2145 GMC?

The repair time for OBDII code B2145 GMC can vary depending on the exact cause of the issue. Simple repairs like sensor replacement may take less than an hour, while complex wiring or module replacements could take longer.

9. Can resetting the OBDII system clear code B2145 GMC temporarily?

Resetting the OBDII system may temporarily clear OBDII code B2145 GMC, but if the underlying issue is not addressed, the code is likely to reappear once the problem is detected again.

10. Are there any maintenance tips to prevent OBDII code B2145 GMC from occurring?

Regularly inspecting the outside rearview mirrors and their components for damage, keeping the mirror system clean and well-maintained, and addressing any issues promptly can help prevent OBDII code B2145 GMC from occurring.

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