AutoCodes – Chevrolet – B2148 Chevrolet

B2148 Chevrolet 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: B2148 Chevrolet 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.

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Code Popularity 693

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 B2148 Chevrolet 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 B2148 Chevrolet - Outside Rearview Mirror Position Sensor Input Voltage Low - AutoCodes.com — B2148 Chevrolet Code - Outside Rearview Mirror Position Sensor Input Voltage Low

What does this mean?

What are the Possible Causes of the DTC B2148 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 B2148 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 B2148 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 B2148 Chevrolet Code

1. What does the OBDII code B2148 mean for a Chevrolet vehicle?

B2148 indicates that the input voltage from the outside rearview mirror position sensor is lower than the expected range.

2. What are the common symptoms of the B2148 code in a Chevrolet?

Common symptoms include unresponsive or erratic movement of the power side mirrors and possible dimming or malfunction of mirror-integrated features like turn signals.

3. What causes the B2148 code to appear?

The code can be caused by a faulty mirror position sensor, damaged wiring, corroded connectors, or issues with the control module.

4. Can I still drive my Chevrolet with the B2148 code?

Yes, this code generally doesnâ€™t affect drivability, but the side mirrors may not adjust properly, which can impact visibility and safety.

5. How do I diagnose the B2148 code in a Chevrolet?

Diagnose the code by inspecting the wiring and connectors to the mirror, testing the position sensor for proper voltage, and using a scan tool to monitor the sensor's data.

6. How can I fix the B2148 code on my Chevrolet?

Repairs may include replacing the mirror position sensor, repairing damaged wiring, cleaning corroded connectors, or reprogramming the control module if necessary.

7. How much does it cost to repair the B2148 code?

The cost varies depending on the issue, but replacing a mirror position sensor typically costs $100â€“$300, including parts and labor.

8. Can a blown fuse cause the B2148 code in a Chevrolet?

Yes, a blown fuse in the mirror control circuit can result in low voltage and trigger the B2148 code.

9. Do I need to replace the entire mirror assembly for a B2148 code?

Not necessarily. If the issue is isolated to the position sensor or wiring, you can replace or repair those components without replacing the entire mirror.

10. Can clearing the B2148 code fix the issue?

Clearing the code without addressing the underlying problem will only temporarily erase it. The code will return if the issue isnâ€™t resolved.