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Trunk won't release/latch

24158 Views 10 Replies 10 Participants Last post by  PercyDM
I can't believe there's no exterior key option at all. Basically, if the power trunk won't work, you have to crawl through the folding seat and manually release it with the emergency cord. This is a really horrid design.

A couple months ago, my power-down feature stopped working reliably. Then the power lift stopped working reliably. Both would still work occasionally, but not reliably. Didn't matter to me, I don't care if I have to manually lift or close the trunk,. and everything else still worked.

Then a few days ago, the trunk pop button didn't work. Used the remote - nothing. Tried a few times, finally worked. Didn't think much of it.

It's been getting progressively worse, and as of yesterday, i had to crawl through and pop the trunk manually twice while running errands. Thankfully it worked fine when I had customers with luggage. When it won't pop, it also wont cinch. Like, when i close it, it'll LATCH - but it won't motor down tightly and stays "loose".

Today it has stopped working completely. I had to crawl through to release it both on pickup and drop off of an airport customer - talk about embarrassing.

Everything says to disconnect the battery and perform a BCU reset, but I fail to see how that could change anything. The BCU seems to believe it's working, because when I use the remote to pop or close it, it flashes the lights and pretends it's doing the thing - it just doesn't actually do the thing. Weirdly, it also doesn't seem, to know the trunk is open. No warning message or lights, nothing saying the trunk is ajar - even when I *know* it is.

Anyone come across this before..? Is it a BCU issue, or should I replace the trunk latch motor? Why would the power up and down motor and the release/latch motor both crap the bed at almost the same time? Or for that matter - why separately? And why on earth would EITHER of these things affect the ability of the car to know if the trunk is closed?!

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Did this end up fixing your issue? With the battery drainage and all?

I'm having the same issue with my lincol MKZ 2015. Gonna get it taken to get looked at tomorrow. I hope its coveted under my extended warranty (it should be)

Just this past Monday I tried starting my car with remote start and it kept blinking red. I found it odd, so I went outside and next think I know my car was completely dead. I had thought I left the lights on or something. Figured it was my bad. So I just jumped started it. Everything was fine, until the next day I tried starting it. It started but my trunk would not open at all. I thought it was very strange! Tried my remote, wouldn't open, tried the button on the dashboard, NOPE! so I looked up some videos on YouTube and came to find out these models are infamous for trunk module issues, which also causes battery drainage issues. The next day, my car was dead again. I jumped it and I just left my trunk alone, I said I wasn't gonna even bother opening it as I didn't want it to kill my battery again. I thought that would atleast fix the issue for now so I wouldn't have to keep jump starting it but NOPE. This morning I tried remote starting it again and it was completely dead once again. So I'm just wondering if replacing the module fixed all your issues along with your battery issues? I've had this car for a month and its already gave me transmission shifting issues and now my battery and trunk 😭 its draining my pockets off deductibles alone. I need help.
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