The door Ajar started just after the rainy session in May 2010. My alarm started to go off and the lights where on, like someone had open a door. The way i found out it was the one of the front doors, the radio use to stay on for a few minutes after the SUV was turned off. Now every thing turns. After a few minutes the lights turned off while the SUV was running. I open the Drivers doors and the lights came on. Then i open the passenger side and the lights did not come on. Makes me to believe it the front passenger side with the issue.

Update from Jun 3, 2010: I sprayed WD40 and blow high pressure air all around the door latch once a day for 5 days. At the 5th day, the door ajar light started to come and go more aften. Two days later it seemed to have fixed the issue.

I have seen the door ajar light on in the past but a couple seconds it would turn off. We used to go all around everyone opening and slamming the doors to try and see if it would go off. It would take a couple seconds then it would go off. On May 1,2010 we had severe weather and lots of rain. When I started my truck up the door ajar light was on again! We went around the truck opening and closing doors and checking the hatch. So I went ahead and drove,the doors didn't lock automatically. When I tried to turn the alarm on the lights remained on! So irritating I don't have extra money to get this fixed! Can someone out there help! I will try the WD-40 and pray it works! I was amazed to see so many other people have this horrible problem!

well first thing everyone, when we got this 2003 expedition it was beautiful. my wife loved it, the kids loved it, I loved it. but a month passed. and the door ajar light came on. we took it back and they said it was fixed. we paid 245.00 dollars & two months passed and it did it again took it back& the guy told us everything working fine. but we can't get it to come off so he said we would give u a call. never happenned. its been over five years now and its still on but let me say this to everyone - whats going to happen next if your truck burns a lot of gas u have a big problem like do now. the codes for my problem are p0420 p2196 p2198 and all four 02 sensor are gone. the 2003 ford expedition should be put at the bottom of a lake. ford should do something about this problem. I would never buy ford again. never. and the bad part is ford knows this is going on and they don't care.

This is determinately annoying. Door ajar and dome lights stay on however dome lights will go off after a while. Electric door locks does not lock like there supposed to when driving. Both driver side and passenger side mirrors malfunction when you put the car in reverse they do not return to the original setting. Cannot adjust setting from inside the car i have to manually move the mirrors. This was repaired once in 2005 in California by Ford. Tried the WD 40 but did not help. Always bought Ford products and have no other compliant about the Expedition but think my 2002 Chevy has had less problems.

From the very first night that I brought my vehicle home, lights stayed on, both the puddle lamps as well as interior lights. The horn honked twice when locking it, indicating that there is a problem with the vehicle or indicating that a door is ajar. I came back out the next day and the battery was dead. I was furious. It has only happened a few times, but for the most part, it is working ok now. Apparently, it might have come from no one riding on the passenger side for quite some time, but now that I have my girlfriend using the side door, it seems to have the sensor working properly now. But yes, it is a pain in the ass!

We got this car with in the summer of 2004 as a family car for my wife. I am more of a Chevy guy, but this is what she wanted. Every car has its small problems and this one is no different. It started small with a coil pack going out. Then the factory tires seamed to go way to soon. Even with regular rotating and balancing I could not get good life out of them. The brake dust is just a Ford thing in my opinion. After that, it was the rear dvd that quit working. I did not have it looked at, and about 3 months later the entire radio just stopped working. I was told by a local dealer that they do that and I would need a new one. I purchased an aftermarket unit for less money and in my mind got something not prone to problems. After that it was the door ajar and that constant BEEPING! That was it. I hate this thing. No one can tell me how to fix it. If I pull the fuse to make it stop, he hole dash shuts down. In my mind this thing sucks. My 92 Chevy has fewer problems and has almost 200,000 miles on it. I hope that I can avoid Ford vehicles for the rest of my life.