B2347 – OBD-II DTC

OBD-II DTC B2347 – Mirror Switch Reference Voltage Positive Common Supply Low Voltage

DTC B2347 meaning

DTC B2347 refers to a diagnostic trouble code indicating a problem with the mirror switch reference voltage. Specifically, it signifies that the positive common supply voltage for the mirror switch is lower than expected. This can affect the functionality of the power mirror system in a vehicle.

DTC B2347 symptoms

Common symptoms associated with DTC B2347 may include:

• Power mirrors not functioning or responding
• Inability to adjust mirror positions
• Mirror switch illumination not working
• Other electrical components in the vicinity may also exhibit issues

DTC B2347 causes

Several factors can lead to the occurrence of DTC B2347, including:

• Faulty mirror switch
• Wiring issues, such as shorts or open circuits
• Corroded or loose electrical connections
• Defective body control module (BCM)
• Low battery voltage or poor ground connections

DTC B2347 seriousness

The seriousness of DTC B2347 can vary. While it may not pose an immediate safety risk, it can lead to reduced visibility due to non-functioning mirrors. This can increase the likelihood of accidents. Therefore, it is advisable to address the issue promptly to ensure safe vehicle operation.

How to diagnose DTC B2347

To diagnose DTC B2347, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the code.
2. Inspect the mirror switch for physical damage or wear.
3. Check the wiring and connectors for signs of corrosion or damage.
4. Test the voltage at the mirror switch using a multimeter.
5. Examine the body control module for faults or issues.
6. Clear the code and see if it returns after a test drive.

How to fix DTC B2347 step-by-step instructions

To fix DTC B2347, follow these step-by-step instructions:

1. Disconnect the vehicle’s battery to ensure safety.
2. Inspect and repair any damaged wiring or connectors related to the mirror switch.
3. Replace the mirror switch if it is found to be faulty.
4. Check and repair any issues with the body control module if necessary.
5. Reconnect the battery and clear the DTC using an OBD-II scanner.
6. Test the power mirrors to ensure they are functioning correctly.

How to erase DTC B2347

To erase DTC B2347, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Navigate to the trouble codes section on the scanner.
4. Select the option to clear or erase the codes.
5. Confirm the action and wait for the scanner to complete the process.
6. Disconnect the scanner and perform a test drive to ensure the code does not return.

Recommended tools for OBD-II diagnostics

Explore our expert picks: The Best OBD2 Scanners for 2025

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.