OBD-II DTC B2312 – Mirror Passenger Horizontal Feedback Potentiometer Circuit Failure
DTC B2312 meaning
DTC B2312 refers to a diagnostic trouble code indicating a failure in the passenger side mirror’s horizontal feedback potentiometer circuit. This component is responsible for providing feedback to the vehicle’s control module regarding the position of the mirror. When this circuit fails, it can lead to improper functioning of the mirror adjustment system.
DTC B2312 symptoms
Common symptoms associated with DTC B2312 may include:
- Inability to adjust the passenger side mirror horizontally.
- Mirror position may be stuck or unresponsive.
- Warning lights or messages on the dashboard related to the mirror system.
- Other mirror functions, such as vertical adjustment, may still work.
DTC B2312 causes
Several factors can lead to the occurrence of DTC B2312, including:
- Faulty horizontal feedback potentiometer.
- Wiring issues, such as shorts or open circuits in the mirror adjustment circuit.
- Corrosion or damage to the electrical connectors.
- Malfunctioning control module that processes the mirror position data.
DTC B2312 seriousness
The seriousness of DTC B2312 can vary. While it may not pose an immediate safety risk, it can affect the driver’s ability to adjust the passenger side mirror properly, leading to visibility issues. It is advisable to address this code promptly to ensure optimal vehicle operation and safety.
How to diagnose DTC B2312
To diagnose DTC B2312, follow these steps:
- Use an OBD-II scanner to confirm the presence of the DTC.
- Inspect the wiring and connectors related to the passenger side mirror for any visible damage or corrosion.
- Test the horizontal feedback potentiometer using a multimeter to check for proper resistance values.
- Check the control module for any additional fault codes that may indicate related issues.
- Perform a functional test of the mirror adjustment system to see if the issue persists.
How to fix DTC B2312 step-by-step instructions
To fix DTC B2312, follow these steps:
- Disconnect the vehicle’s battery to ensure safety while working on electrical components.
- Inspect and repair any damaged wiring or connectors associated with the mirror adjustment circuit.
- If the horizontal feedback potentiometer is faulty, replace it with a new one.
- Reconnect all electrical connections securely and ensure there is no corrosion.
- Reconnect the vehicle’s battery and clear the DTC using an OBD-II scanner.
- Test the mirror adjustment system to confirm that the issue has been resolved.
How to erase DTC B2312
To erase DTC B2312, follow these steps:
- Connect an OBD-II scanner to the vehicle’s diagnostic port.
- Turn on the vehicle’s ignition without starting the engine.
- Navigate to the option to clear or erase trouble codes on the scanner.
- Confirm the action to erase the DTC.
- Disconnect the scanner and start the vehicle to ensure the code does not reappear.
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.