Why does the car keep showing that the door is open?
3 Answers
Because the door sensor system has malfunctioned, you can rematch the car's cabin door sensor system. Below is a related introduction about door lock and door light malfunctions: 1. Causes: The door or trunk is not properly closed. The car's sensor system has malfunctioned. The door's latch switch has malfunctioned. 2. Solutions: Slightly forcefully close the four doors and trunk again to resolve the issue. Restart the car, then ensure all doors and the trunk are properly closed and check if the door light is still on. The door lights are controlled by the door switches, and each door has a corresponding latch switch for control. You can locate the latch switch at the connection point between the door and the car body. If the door light is on, press the latch switch in; if the light turns off, you can rule out this issue.
I've driven a taxi for over a decade and frequently encounter such issues—either the door isn't fully closed or the sensor is malfunctioning. There are small switches along the door edges that detect whether the door is shut. If they accumulate dust, rust, or get damaged, they can falsely indicate an open door. Wiring problems, like loose plugs or aged circuits causing short circuits, can also make the dashboard persistently show an open door. When checking, first firmly close all doors, especially the trunk, which is often overlooked. If the light remains on after confirming all doors are shut, you'll need to inspect each sensor one by one. Try wiping the manual switches along the door frame with a damp cloth. I recommend not delaying and visiting a repair shop promptly, as driving with the door indicated as open affects air conditioning efficiency and fuel consumption—safety comes first. During regular car washes, pay attention to cleaning the door frame gaps to prevent dust buildup and potential malfunctions.
As a car enthusiast, my old Volkswagen also had this issue—it turned out the door switch was stuck. The car door lock system has a sensor, a small button-like component in the corner of the door frame. Over time, insufficient lubrication or aging springs can prevent it from returning to its original position, causing the signal to continuously indicate an open door. The wiring connectors may also oxidize, leading to poor contact, or rainwater seepage causing a short circuit. The inspection method is simple: gently tap the sensor area on the door frame to see if the light turns off, and ensure the door is properly closed by pulling the handle to confirm the locking position. When I dealt with it, cleaning the contacts myself solved the problem—saving both money and time. If that doesn’t work, check the fuse and control module. Remember, this issue can affect the auto-lock function, and the annoying alarm sound while driving is a hassle, so get it repaired promptly to avoid further damage.
