AutoCodes – Generic – B2349

B2349 Code - Mirror Switch Reference Voltage Negative Common Open Circuit

Quick Answer

The Body Control Module (BCM) monitors the Mirror Switch. Common causes include Faulty Mirror Switch, Mirror Switch harness is open or shorted, Mirror Switch 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: B2349 indicates Mirror Switch Reference Voltage Negative Common Open Circuit.
Common causes: Common causes include Faulty Mirror Switch, Mirror Switch harness is open or shorted, Mirror Switch 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 3,476

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 Nov 12, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code B2349 Description

The Body Control Module (BCM) monitors the Mirror Switch. The BCM sets the OBDII code when the Mirror Switch is not to factory specifications.

OBDII Code B2349 - Mirror Switch Reference Voltage Negative Common Open Circuit - AutoCodes.com — B2349 Code - Mirror Switch Reference Voltage Negative Common Open Circuit

What does this mean?

What are the Possible Causes of the DTC B2349?

Faulty Mirror Switch
Mirror Switch harness is open or shorted
Mirror Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B2349?

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 B2349 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 B2349 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.