B1669 – OBD-II DTC

OBD-II DTC B1669 – Mirror Passenger Up/Down Motor Stalled

DTC B1669 meaning

DTC B1669 refers to a diagnostic trouble code indicating that the passenger side mirror’s up/down motor has stalled. This code is part of the On-Board Diagnostics II (OBD-II) system, which monitors various vehicle components for faults. When the system detects that the motor responsible for adjusting the passenger mirror is not functioning correctly, it triggers this code to alert the technician of a potential issue.

DTC B1669 symptoms

Common symptoms associated with DTC B1669 may include:

• The passenger side mirror does not move up or down when the control switch is activated.
• Intermittent movement of the mirror, indicating a possible electrical issue.
• Unusual noises coming from the mirror assembly when attempting to adjust it.
• Other mirror functions, such as left/right movement, may still operate normally.

DTC B1669 causes

Several factors can lead to the occurrence of DTC B1669, including:

• A faulty passenger side mirror motor.
• Wiring issues, such as frayed or damaged wires in the mirror harness.
• A malfunctioning control switch that fails to send the correct signals.
• Corrosion or poor connections in the electrical system related to the mirror.
• Issues with the vehicle’s body control module (BCM) that may affect mirror operation.

DTC B1669 seriousness

The seriousness of DTC B1669 can vary based on the vehicle’s use and the driver’s reliance on the passenger side mirror. While it may not pose an immediate safety risk, it can hinder visibility and increase the likelihood of accidents. Therefore, it is advisable to address this issue promptly to ensure safe driving conditions.

How to diagnose DTC B1669

To diagnose DTC B1669, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the B1669 code.
2. Inspect the passenger side mirror for physical damage or obstructions.
3. Check the wiring and connectors for signs of wear, corrosion, or damage.
4. Test the control switch for proper operation using a multimeter.
5. Examine the mirror motor by applying direct power to see if it operates.
6. Check the body control module for any related fault codes or issues.

How to fix DTC B1669 step-by-step instructions

To fix DTC B1669, follow these step-by-step instructions:

1. Confirm the diagnosis by following the diagnostic steps outlined above.
2. If the mirror motor is faulty, replace it with a new or refurbished unit.
3. Repair or replace any damaged wiring or connectors in the mirror harness.
4. If the control switch is defective, replace it to restore functionality.
5. Clear any corrosion from electrical connections and ensure they are secure.
6. Recheck the system by reconnecting everything and testing the mirror operation.

How to erase DTC B1669

To erase DTC B1669 from the vehicle’s computer, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn the ignition key to the “On” position without starting the engine.
3. Navigate to the “Erase Codes” or “Clear Codes” option on the scanner.
4. Follow the prompts to clear the DTC from the system.
5. 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.