B1365 DTC Code: What You Need to Know


In the world of automotive diagnostics, DTC codes play a crucial role in identifying and solving issues with a vehicle’s various systems. B1365 is one such DTC code that may pop up on your vehicle’s diagnostic system. In this article, we will delve deep into the meaning and implications of the B1365 DTC code, providing you with a comprehensive understanding of this particular diagnostic trouble code.

Understanding DTC Codes

DTC stands for Diagnostic Trouble Code, which is a standardized system used in the automotive industry to identify and classify faults or issues within a vehicle’s systems. Each DTC code consists of a prefix followed by a combination of numbers and letters, with each character providing specific information about the problem it represents.

Exploring the B1365 DTC Code

The B1365 DTC code specifically pertains to the vehicle’s “Mirror Passenger Horizontal Feedback Potentiometer Circuit Open” issue. This code is commonly associated with power mirrors found in modern vehicles, and it indicates a problem within the circuit that controls the horizontal movement of the passenger-side mirror.

Possible Causes of the B1365 DTC Code

Several factors can trigger the B1365 DTC code. Here are some potential causes:

  1. Faulty wiring: One of the primary culprits behind the B1365 DTC code is damaged or loose wiring within the mirror control circuitry. If the wiring harness is compromised, the electrical signals required for smooth mirror operation may be disrupted, triggering the code.

  2. Defective mirror motor: Another common cause of the B1365 DTC code is a faulty mirror motor. Over time, these motors can wear out or become damaged, leading to improper functioning and generating the DTC code.

  3. Malfunctioning mirror control module: The mirror control module is responsible for interpreting signals from the control switches and translating them into mirror movements. If this module malfunctions or fails, it may trigger the B1365 DTC code as a result of the feedback potentiometer circuit being compromised.

Diagnostic Steps to Address the B1365 DTC Code

To diagnose and rectify the B1365 DTC code, you can follow these steps:

  1. Inspect the wiring: Begin by thoroughly inspecting the wiring harness that connects the mirror control module to the passenger-side mirror. Look for any visible signs of damage, such as frayed wires or loose connections. If any faults are found, repair or replace the affected wiring as necessary.

  2. Check the mirror motor: Next, test the mirror motor by applying power directly to it. If the motor fails to move or exhibits any signs of malfunction, it should be replaced.

  3. Scan for additional codes: While the B1365 DTC code may be the primary issue flagged by your vehicle’s diagnostic system, it’s essential to perform a comprehensive scan to check for any related codes. This step helps ensure that you address all underlying problems contributing to the B1365 code.

  4. Replace the mirror control module: If all wiring and motor checks yield no issues, the problem may lie with the mirror control module. In such cases, replacing the module should resolve the B1365 DTC code.

Frequently Asked Questions

  1. Q: Can I still use my power mirrors if the B1365 DTC code is present?

    • A: In most cases, the presence of the B1365 DTC code won’t prevent you from using your power mirrors, although their movement may be limited or malfunctioning. However, it’s advisable to address the issue promptly to ensure proper functionality.
  2. Q: Is the B1365 DTC code specific to a particular vehicle make or model?

    • A: No, the B1365 DTC code is not exclusive to any specific make or model. It can occur in various vehicles that have power mirrors equipped with feedback potentiometer circuits.
  3. Q: Can I fix the B1365 DTC code myself, or should I take my vehicle to a professional?

    • A: While it is possible for skilled individuals to address the B1365 DTC code themselves, it is recommended to seek assistance from a qualified automotive technician. They possess the expertise and tools needed to diagnose and resolve the issue accurately, ensuring optimal results and preventing further complications.


The B1365 DTC code relates to an issue with the passenger-side mirror’s horizontal feedback potentiometer circuit. By understanding its potential causes and following the appropriate diagnostic steps, you can effectively address this code and restore proper functionality to your vehicle’s power mirrors. Remember to consult professional help when needed and prioritize timely resolution of any DTC codes to maintain optimum performance and safety.

About author


Meet Sam Mitchell, your experienced and reliable guide in the complex world of car fault codes. With a robust career spanning over 15 years as a professional car mechanic, John has the skills, knowledge, and practical experience to help you navigate car fault issues with confidence.


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