1. Door Switch Misalignment: The door switch may be misaligned or damaged, causing it to send an incorrect signal to the vehicle's computer. This can lead to the "door ajar" warning and prevent the passenger window from rolling down.
2. Faulty Door Lock Mechanism: If the door lock mechanism is not functioning properly, it may not be able to fully engage the door latch. This can cause the vehicle's computer to think that the door is still ajar, even when it is closed, leading to the "door ajar" warning and the inability to roll down the passenger window.
3. Wiring Issues: There may be a problem with the wiring that connects the door switch or the door lock mechanism to the vehicle's computer. A break or short in the wiring can disrupt communication and cause the "door ajar" warning.
4. Computer Malfunction: In some cases, the issue could be related to a problem with the vehicle's computer itself. A software glitch or a hardware malfunction can cause the computer to misinterpret the signals from the door switch or the door lock mechanism.
To resolve this issue, it's recommended to take your car to a mechanic or an automotive technician who can diagnose the exact cause of the problem. They will be able to properly inspect and repair the faulty component or system, allowing the passenger window to function normally again.
