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"key Not Detected"


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I'm getting a constant warning on my Mondeo Titanium that the key battery is low. I've changed the battery for a new, good quality replacement but the warning symbol returned within a day or two. I've put up with it for a few weeks because I know the battery is new, but I'm occasionally getting a 'Key not detected' warning, which is rather worrying because the car won't start.....! It seems to sort itself out after ten seconds or so, but it's obviously a bit worrying because one day it won't!

I recall hearing about one or two problems from others. Anyone had similar issues?

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I get the same problem on titainum x about every six month I change the battery and it last for another six months but no one has managed to find a resolve for myself be interesting now they've been out a while if now resolve

Sent from my iPhone using Ford OC

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  • 2 weeks later...

My focus keys are very sensitive to the batteries, I got some Maxell batteries and was getting through them at the rate of one per 2 weeks. Key not detected, key not unlocking car sometimes, remote battery low. I put an enegizer in about 2-3 months ago and no issues whatsoever since.

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Hi Higgsy that seems a lot !, I've had my car almost 2 years and I've never replaced any batteries, Am on my 7th Mondeo since they began in 1993 " K-reg" and I've only ever changed one set in my R reg ST Mondeo I had years ago.

Sent from my HTC One X using Ford OC mobile app

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What I was getting at was the keyless remotes don't like certain brands of batteries, I had a maxell battery in my old corsa remote for years and didn't ever need to change it, yet when using them in the focus keyless remote they caused issues.

Sent from my Zetec S using the FOC for Android app

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