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Trunk won't release/latch

24172 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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I am having the same issue, the trunk would intermittently not open or close, then the battery would drain completely if the car sat for more than 24 hours. Then the intermittent part became always.... Something else that I have noticed is that the settings in the menu for the trunk (power decklid) will not let you change them.

I took the car to the dealer and they have diagnosed it as a faulty trunk control module which will set me back $600.00. I will update this post after they have replaced it...

thanks for all the information!

Kevin Kizer
2015 MKZ
My buddy is looking at this MKZ with an intermittent trunk latch issue. The dealer mentioned it's the trunk control module. We'll take a look at it after we finish installing the exhaust and cold air intakes on the truck this weekend. Appreciate any update after you replaced it.
1 - 1 of 11 Posts
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