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Engine-Codes – Generic – B2348

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

Quick Answer

The B2348 diagnostic trouble code (DTC) indicates a Mirror Switch Reference Voltage Positive Common Supply Voltage Fault. Common causes include Faulty mirror switch, Electrical system issues, such as a blown fuse or wiring damage, Poor connection or corrosion in the mirror switch circuit. 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, Electrical system issues, such as a blown fuse or wiring damage, Poor connection or corrosion in the mirror switch circuit.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code B2348 Description

The B2348 diagnostic trouble code (DTC) indicates a Mirror Switch Reference Voltage Positive Common Supply Voltage Fault. This means that there is an issue with the electrical system related to the mirror switch in the vehicle. The mirror switch is responsible for controlling the movement of the mirrors in the vehicle, allowing the driver to adjust them for optimal visibility. When this reference voltage fault occurs, it can affect the functionality of the mirror switch, leading to potential issues with adjusting the mirrors as needed.

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

Common Causes of B2348

  1. Faulty mirror switch.
  2. Electrical system issues, such as a blown fuse or wiring damage.
  3. Poor connection or corrosion in the mirror switch circuit.
  4. Malfunctioning mirror motor.
  5. Issue with the supply voltage from the vehicle's battery.

Symptoms of B2348

  1. Inability to adjust the mirrors using the mirror switch controls.
  2. Erratic movement of the mirrors when attempting to adjust them.
  3. Mirror switch not responding or functioning intermittently.
  4. Warning light on the dashboard related to the mirror system.
  5. Unusual noises coming from the mirror switch area when attempting to adjust the mirrors.

How to Fix B2348

  1. Begin by conducting a thorough inspection of the mirror switch, wiring, and electrical connections to identify any visible damage or issues.
  2. Test the mirror switch and mirror motor using a multimeter to determine if they are functioning properly.
  3. Check the supply voltage to the mirror switch to ensure it is within the specified range.
  4. Replace any faulty components, such as the mirror switch, mirror motor, or damaged wiring.
  5. Clear the DTC from the vehicle's computer system using a diagnostic scanner to reset the error code and verify that the issue has been resolved.

Cost to Fix B2348

The typical repair costs for addressing a Mirror Switch Reference Voltage Positive Common Supply Voltage Fault can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the cost of parts for replacing a mirror switch or mirror motor can range from $50 to $200, while labor costs can range from $100 to $300. Additional costs for diagnostic testing and potential electrical system repairs may also apply. It is recommended to consult with a qualified mechanic or auto repair shop for a more accurate cost estimate based on the specific vehicle make and model.

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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 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.

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