Skip the auto shop - Our mechanics make house calls

Q: Car door alarm sensors keep going off while car is on, because of that I can't even lock my doors when it's off.

asked by on

Last night after cleaning out my car I closed all the doors then tried to lock it and the extra long beep went off (which usually only happens if my keys are in the car or if the doors are opened). The "open door "light on my dashboard was blinking so I rechecked every door and closed them all again, and it still said they were open. I reluctantly just did not lock my car and called it a night. And then this morning when I left for work the same sensor was still blinking only this time it BEEPED the entire time I was driving(not or long beep a short consistent beep beep beep), because supposedly "a door was open" even though I checked and re checked and they were all closed. So now I cannot lock my car or drive without it beeping like crazy because of the "open doors". I leave tomorrow morning for a drive to San Francisco and this can't be an issue. How do I turn this off or fix it?

My car has 56600 miles.
My car has an automatic transmission.

Hi and thanks for contacting Your Mechanic. What seem to happen is a door sensor / switch has failed. Turn on the dome light to door and shut all of the doors. See if the light dims after shutting all of the doors. If the light does not dim, then there is a door switch that has failed. Look at the switches on the cab where the door seals and see if any of the switched look damaged or at an angle. Most of the time the driver door switch fails for that door is used the most. Check each switch for power and see which door switch does not have power on the ground side when activating the switch. Replace the switch that does not work. This also goes for the back hatch switch as well. If you need further assistance with your vehicle, then seek out a professional, such as one from Your Mechanic, to help you with your door light being on and the beeping noises.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  • Home
  • Questions
  • Car door alarm sensors keep going off while car is on, because of that I can't even lock my doors when it's off.

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: How do I unlock my 2017 Ford Focus without the horn sounding?

Hello, thank you for writing in. There are different settings for each manufacturer, and you may need to hold the unlock and lock button down a little longer on your vehicle. However, if you are pressing the locking buttons twice,...

Q: When would one expect to need to replace a drive belt and tensioner?

Hi, thanks for writing in. Around the three year 60,000 mile mark is where I would think the belt would need to be replaced. You are on for the years but well over the miles. If you would like help...

Q: Check engine light is on

Hello, thank you for writing in. The check engine light coming on for the ignition system is telling you the spark plugs are not working correctly. This may be an issue with the plugs, their wires, the module, or the...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.