cancel
Showing results for 
Search instead for 
Did you mean: 

Key Confusion

Moderator
Moderator
Posts: 25,789
Thanks: 1,134
Fixes: 47
Registered: 14-04-2007

Key Confusion

I have a Ford Focus with remote central locking which normally works fine.
This morning my daughter and her family arrived in their Ford Mondeo to borrow a booster seat I had in my car.
My key wouldn't work remotely so I unlocked the car manually, took out the booster seat and manually locked my car.
After they had gone I went out to my car and unlocked it remotely Huh
This used to happen occasionally when my neighbour parked his Ford Focus near mine (until he wrote his off).
It's like the key sees two remote locking cars and can't decide which to operate so gives up Roll eyes
Customer and Forum Moderator.
Product of the Tyrell Corporation
13 REPLIES
Community Veteran
Posts: 18,551
Thanks: 194
Registered: 12-08-2007

Re: Key Confusion

How old is the key Strat? Could be it needs a new battery.
Moderator
Moderator
Posts: 25,789
Thanks: 1,134
Fixes: 47
Registered: 14-04-2007

Re: Key Confusion

I thought of that and the battery will be 2 years old in April.
The thing is when it works, which is most of the time, it will unlock the car from 30 feet or more.
It just gives trouble when there's another Ford close by with remote locking....and not every time Huh
Customer and Forum Moderator.
Product of the Tyrell Corporation
Community Veteran
Posts: 16,862
Thanks: 1,141
Fixes: 13
Registered: 06-11-2007

Re: Key Confusion

Quote from: Strat

It's like the key sees two remote locking cars and can't decide which to operate so gives up Roll eyes


That`s Ford, for you.... always looking for the cheapest way to do things !....
alanf
Aspiring Pro
Posts: 1,931
Thanks: 77
Fixes: 1
Registered: 17-10-2007

Re: Key Confusion

Next time try using your head.
https://www.youtube.com/watch?v=0Uqf71muwWc
I was wondering if the problem was due to the EM waves reflected from the adjacent car destructively interfering with the signal. But if that were the case I would expect everyone's car would have problems in a car park surrounded by other cars.
Community Veteran
Posts: 18,551
Thanks: 194
Registered: 12-08-2007

Re: Key Confusion

I think I'll be one of many trying this over the weekend Wink Wink
PowerLee
Rising Star
Posts: 543
Thanks: 12
Registered: 12-03-2013

Re: Key Confusion

How old is the Focus?
There are several different types of remote locking systems fitted to the Focus depending on its age.
Moderator
Moderator
Posts: 25,789
Thanks: 1,134
Fixes: 47
Registered: 14-04-2007

Re: Key Confusion

06 plate.
Customer and Forum Moderator.
Product of the Tyrell Corporation
Kremmen
Rising Star
Posts: 496
Thanks: 5
Fixes: 1
Registered: 13-04-2013

Re: Key Confusion

I've heard of problems with quite a few car makes when parked near 'interference'. I think you're right though that for some reason your remote is trying to unlock the wrong car. Presumably you even went right up to your car to make sure it was the closest.
Let's be careful out there !
Community Veteran
Posts: 3,380
Thanks: 2
Registered: 18-01-2013

Re: Key Confusion

Next time, park the Mondeo up but don't lock it.
See if the Focus will unlock.
Then try again, park the Mondeo up and lock/unlock it this time.
If the Focus doesn't unlock, it could be that it is seeing the lock/unlock signal from the Mondeo and either thinking it may be being "hacked" or going to the next rolling part of its cryptography sequence and knocking out the rolling code sequence with your other keyfob.
There was a dead area in Northampton where my Vectra would refuse to unlock or lock with the keyfob and it turned out there was a misbehaving PIR sensor in a property nearby which was effectively jamming the car keyfobs.
Community Veteran
Posts: 18,551
Thanks: 194
Registered: 12-08-2007

Re: Key Confusion

I still think I would try a new battery in the key to see if that has a result.
Moderator
Moderator
Posts: 25,789
Thanks: 1,134
Fixes: 47
Registered: 14-04-2007

Re: Key Confusion

I'll give it a try artmo.
Quote from: DomS
...it turned out there was a misbehaving PIR sensor in a property nearby which was effectively jamming the car keyfobs.

There is a PIR on the light outside my front door Undecided
Customer and Forum Moderator.
Product of the Tyrell Corporation
Community Veteran
Posts: 18,551
Thanks: 194
Registered: 12-08-2007

Re: Key Confusion

When I changed the battery on my key I took too long to do it and the key wouldn't 'see' the car. Ford told me how to do it and it worked fine afterwards.
Community Veteran
Posts: 3,380
Thanks: 2
Registered: 18-01-2013

Re: Key Confusion

Quote from: Strat
There is a PIR on the light outside my front door Undecided

A normal PIR wouldn't affect it. These PIR's were wireless alarm PIR's operating on the same 433Mhz (or whatever) frequency of the car alarm keyfobs. They are meant to kick out a signal every so often but this one was almost transmitting constantly.