What to Do When the Light Stays On with the Car Door Open?
2 Answers
First, check if each door is properly closed. Then, inspect the door sensor switches one by one to see if they are malfunctioning, and replace them if necessary. If you are certain that the car doors are securely closed and unable to check the sensor switches, it is recommended to take the car to a 4S shop for circuit inspection and repair.
I usually pay close attention to these minor issues. If the car door isn't properly closed, the dashboard warning light will stay on, which is mainly caused by the door lock sensor. There's a spring-loaded switch near the hinges of each door – when the door is fully closed, the switch gets pressed down and the circuit breaks. If it doesn't sense the door closing action, it will default to assuming the door is open. First, check if the door seal rubber strip has aged or deformed, blocking the sensor, or if winter ice has caused the switch to stick. Also, the trunk lid is often overlooked – if a hatchback's trunk isn't securely closed, it will also trigger the light. I recommend trying to firmly reclose all doors while observing the dashboard light. If the light persists, consider sensor failure. Older cars often develop this issue as the sensor's spring loses elasticity over time and needs replacement. Those with DIY skills can remove the interior trim panel to adjust it – the sensor is located above the door lock, and a new one costs just a few dozen yuan. If all else fails, visit a repair shop to avoid draining the battery. Remember, developing the habit of checking the dashboard after closing doors is crucial – if the dashboard light remains on, it means a door isn't fully shut.
