AutoCodes – Generic – B2348

B2348 Code - Mirror Switch Reference Voltage Positive Common Supply Voltage Fault

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: B2348 indicates Mirror Switch Reference Voltage Positive Common Supply Voltage Fault.
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 5,319

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
FAQs
Comments
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Code B2348 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 B2348 - Mirror Switch Reference Voltage Positive Common Supply Voltage Fault - AutoCodes.com — B2348 Code - Mirror Switch Reference Voltage Positive Common Supply Voltage Fault

What does this mean?

What are the Possible Causes of the DTC B2348?

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 B2348?

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 B2348 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 B2348 code?

Need more information on how to fix the B2348 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2348 code diagnosed by a professional: Find a repair shop in your area

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 B2348 Code

1. What are the common symptoms of OBDII code B2348?

When OBDII code B2348 is triggered, common symptoms may include malfunctioning power mirrors, inoperative mirror adjustments, or a non-responsive mirror switch.

2. What causes the Mirror Switch Reference Voltage Positive Common Supply Voltage Fault (B2348) code?

This code is typically caused by issues with the mirror switch itself, a faulty mirror control module, wiring issues, or a blown fuse related to the mirror system.

3. How can I diagnose the Mirror Switch Reference Voltage Positive Common Supply Voltage Fault (B2348) code?

Diagnosing this code usually involves checking the mirror switch for proper operation, inspecting the wiring for any damage or shorts, and testing the mirror control module for faults using a diagnostic tool.

4. Can a DIYer repair the B2348 code at home?

Depending on your mechanical skills and access to tools, DIY repair of the B2348 code may be possible. Simple fixes like checking and replacing fuses or repairing damaged wiring can be done at home, but more complex issues may require professional help.

5. Is it safe to continue driving with the Mirror Switch Reference Voltage Positive Common Supply Voltage Fault (B2348) code present?

While the vehicle is still safe to drive with this code, it's recommended to address the issue promptly to ensure proper functioning of the mirror system for visibility and safety reasons.

6. How much does it typically cost to repair the B2348 code?

The cost of repairing the B2348 code can vary depending on the root cause of the issue. Simple fixes like replacing a fuse or repairing wiring may cost less, while replacing a faulty mirror control module could be more expensive.

7. Are there any preventive measures to avoid triggering the B2348 code?

To prevent the Mirror Switch Reference Voltage Positive Common Supply Voltage Fault (B2348) code, regular maintenance of the mirror system, avoiding water damage to the mirrors, and using the mirror controls gently can help prolong the system's lifespan.

8. Can weather conditions affect the occurrence of the B2348 code?

Extreme weather conditions like excessive heat or moisture can potentially impact the mirror system and contribute to triggering the B2348 code. Keeping the mirrors clean and protected can help minimize weather-related issues.

9. Will resetting the OBDII system clear the B2348 code?

Resetting the OBDII system may temporarily clear the B2348 code, but if the underlying issue is not addressed, the code is likely to reappear. It's important to diagnose and fix the root cause of the problem to prevent future occurrences.

10. Is the Mirror Switch Reference Voltage Positive Common Supply Voltage Fault (B2348) code common in specific car makes or models?

The B2348 code can occur in various car makes and models that are equipped with power mirrors and mirror control systems. It's not limited to a specific manufacturer but is more common in vehicles with advanced mirror functions.