AutoCodes – Chevrolet – B2147 Chevrolet

B2147 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: B2147 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.

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Code Popularity 571

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 B2147 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 B2147 Chevrolet - Outside Rearview Mirror Position Sensor Input Voltage High - AutoCodes.com — B2147 Chevrolet Code - Outside Rearview Mirror Position Sensor Input Voltage High

What does this mean?

What are the Possible Causes of the DTC B2147 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 B2147 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 B2147 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 B2147 Chevrolet Code

1. What are the common symptoms of OBDII code B2147 Chevrolet?

The common symptoms of code B2147 include incorrect mirror adjustments, erratic movement of the outside rearview mirror, and possibly a warning light on the dashboard.

2. What does OBDII code B2147 Chevrolet indicate?

Code B2147 indicates that the outside rearview mirror position sensor input voltage is reading higher than the specified range, causing a malfunction in the mirror positioning system.

3. What are the possible causes of OBDII code B2147 Chevrolet?

Possible causes of code B2147 include a faulty outside rearview mirror position sensor, damaged wiring or connectors in the sensor circuit, or a malfunction in the mirror control module.

4. How can I diagnose OBDII code B2147 Chevrolet?

Diagnosing code B2147 involves using a scan tool to read the code, checking the wiring and connectors for any damage, testing the mirror position sensor, and inspecting the mirror control module for faults.

5. Can I still drive my vehicle with OBDII code B2147 Chevrolet?

It is generally safe to drive the vehicle with code B2147, but it is recommended to address the issue promptly to ensure proper functionality of the outside rearview mirror positioning system.

6. How can I repair OBDII code B2147 Chevrolet?

Repairing code B2147 involves replacing the faulty outside rearview mirror position sensor, repairing any damaged wiring or connectors, or replacing the mirror control module if necessary.

7. Will resetting the OBDII code B2147 Chevrolet fix the issue?

Resetting the code may temporarily clear the warning light, but it will not fix the underlying issue causing code B2147. It is important to diagnose and repair the problem to prevent it from recurring.

8. Can extreme weather conditions cause OBDII code B2147 Chevrolet to trigger?

Extreme weather conditions such as heavy rain or extreme temperatures can potentially cause electrical issues that may trigger code B2147. Ensure all wiring and connectors are securely sealed and protected.

9. How much does it cost to repair OBDII code B2147 Chevrolet at a mechanic?

The cost of repairing code B2147 can vary depending on the specific cause of the issue, the labor rates of the mechanic, and the cost of any replacement parts needed. It is recommended to get a diagnostic and repair estimate from a trusted mechanic.

10. Is OBDII code B2147 Chevrolet a common issue in Chevrolet vehicles?

Code B2147 is not as common as some other OBDII codes, but it can still occur in Chevrolet vehicles with outside rearview mirror positioning systems. Regular maintenance and timely repairs can help prevent this issue.