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Weird problem with keyless entry system

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Old Aug 29, 2025 | 11:21 PM
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Weird problem with keyless entry system

Hey y’all!

I have a 2017 EX 6MT with push to start. It was used and it came with an aftermarket fob only. The problem is that the fob is not the correct fob - it won’t lock nor unlock the car, and you can start the car without the fob being inside it. Logically the problem is that there’s a key lost inside the car.

I took it back to the dealership and they couldn’t find it. They tried doing a all keys lost, but they were unable to program a OEM key after the procedure. Now there are saying that I need the keyless control unit replaced. Has anyone faced the same situation? How screwed am I?

Such a terrible predicament - and my dream car too
 
Old Aug 30, 2025 | 12:30 PM
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A new key won't program if there's another key in proximity. So there's still a key lost somewhere in the car. You gotta tear that car apart and find that key. Most common place I've found keys is under the seat wedged next to or under the seat rail. ....or wait until the key fob battery runs out
 
Old Aug 30, 2025 | 12:32 PM
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Originally Posted by howarejew
A new key won't program if there's another key in proximity. So there's still a key lost somewhere in the car. You gotta tear that car apart and find that key. Most common place I've found keys is under the seat wedged next to or under the seat rail
That’s what the locksmith said originally. The dealership looked for it but unable to locate it. So that’s when they went for the all keys lost situation. I thought that could bypass the key being in proximity, no?
 
Old Aug 30, 2025 | 02:31 PM
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There realistically aren't that many places to lose a key in a Fit. You have surely checked all the storage cubbies.

If you want to tip the front seats backwards or forwards (don't go too far until you unclip the plugs that control airbags or electronic features of your seats) that is easily done after loosening four bolts. Make sure to retighten them.

There is nowhere to hide under the Magic seat since you can flip the bottom up.

I suppose a key could slip alongside the handbrake lever and hide inside the center console. Luckily that also comes out after removing a couple screws. I would first use a good flashlight to look through the handbrake slot.

I suppose a key could hide under the spare tire, but can't think of why one would get there in the first place. It's easy enough to check.

A key on the dash might slide into the defrost vent at the base of the windshield. Not sure if it could drop in far enough to disappear from view.

Finally, I guess a key could get behind the glove box. I suspect it would fall to the floor, but again it should be easy to look from below and/or remove the lower panel under the glove box. Alternatively, at least on my 2010 it is very easy to pop the glovebox (partially) out, which you do when changing the cabin air filter, and that should allow you to see behind the glove box.
 
Old Aug 30, 2025 | 02:35 PM
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Originally Posted by howarejew
A new key won't program if there's another key in proximity. So there's still a key lost somewhere in the car. You gotta tear that car apart and find that key. Most common place I've found keys is under the seat wedged next to or under the seat rail. ....or wait until the key fob battery runs out
The thing is that the dealership tried doing all keys lost. Wouldn’t that bypass the need to have the key?? They weren’t able to program a new one afterwards though.
 
Old Aug 30, 2025 | 02:55 PM
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All keys lost (or any other method) won't work if there's another key in proximity
 
Old Aug 30, 2025 | 02:57 PM
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Originally Posted by howarejew
All keys lost (or any other method) won't work if there's another key in proximity
That must be the reason why they want to replace the whole system. I wonder if that would work. They’re doing it free of charge since it wasn’t me that lost the key - it was like this on sale.
 
Old Aug 30, 2025 | 03:01 PM
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It won't work. When they try to program a new key into the new unit, it will detect both the new key and the one that's lost somewhere in your car and not know which one to program and error out. It's in your best interests to find that key since at the present time anybody can start your car without the key
 
Old Aug 30, 2025 | 03:27 PM
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Originally Posted by howarejew
It won't work. When they try to program a new key into the new unit, it will detect both the new key and the one that's lost somewhere in your car and not know which one to program and error out. It's in your best interests to find that key since at the present time anybody can start your car without the key
Thanks for your help btw

I spoke with them and they said the keyless control unit is probably glitched and thinks that there’s a key inside even though it isn’t. They took out the center console to look already. They have the car right now anyways. I will let this play out since they have motivation to fix it now since I have a courtesy vehicle. Let’s see what happens when the part comes and they can’t program it lol.
 
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