Repeated Fiesta "Key battery low" messages

Repeated Fiesta "Key battery low" messages

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Discussion

Prawo Jazdy

Original Poster:

4,974 posts

221 months

Wednesday 13th July 2022
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Hello,

We have a 2014 Fiesta with the radio key fob that stays in your pocket... so there's a start button and no keyhole... which I'm sure has a neater name than that but I can't remember it. We have two keys, and have owned the car from new. It was a decent number of years before a battery needed replacing in any of the keys. Now we seem to get the "replace battery" message within a couple of weeks of replacing them. I wondered if I was always replacing one fob, and the other was the culprit, but I've now replaced the batteries in both on multiple occasions, only to have the message appear again very quickly.

Have I just bought a dodgy pack of cells, or is there something else going on here? Is something draining the battery quickly? Is the car mistaken?

Any ideas or similar experiences gratefully received.

twing

5,207 posts

138 months

Wednesday 13th July 2022
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This from a thread on here from 2018...

merlin75 said:
we had this on our kuga, went through about 10 batteries, then read online to lock/unlock the car 3 times with the button on the remote and it will reset the warning!! Since doing this we are over a year on the battery so far

Prawo Jazdy

Original Poster:

4,974 posts

221 months

Wednesday 13th July 2022
quotequote all
Nice one! I tried searching online but forgot to search within PH. Thanks for that - I'll give it a try thumbup

sherman

13,835 posts

222 months

Wednesday 13th July 2022
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Why do people never just have a look in the manual for their car?
Suprisingly Ford and most manufacturers write it all down even with pictures sometimes on how to fix basic things on your car. Small book usually about A5 size in a wallet quite often lives in the glovebox of most cars.

twing

5,207 posts

138 months

Wednesday 13th July 2022
quotequote all
sherman said:
Why do people never just have a look in the manual for their car?
Suprisingly Ford and most manufacturers write it all down even with pictures sometimes on how to fix basic things on your car. Small book usually about A5 size in a wallet quite often lives in the glovebox of most cars.
It's a bloke thing!...Never read the destructions smile

Monkeylegend

27,210 posts

238 months

Wednesday 13th July 2022
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Makes sense to post on here and see if someone else has read it for you smile

Prawo Jazdy

Original Poster:

4,974 posts

221 months

Wednesday 13th July 2022
quotequote all
I don't have the car here at the moment, so I can't see what the manual says. However, I'm fairly sure the warning has gone away in the past after changing a battery. So I didn't think it was a warning that needed resetting, since it went away without a reset in the past. Also, when the battery first ran out on the "main" key, the second key didn't trigger the warning since it was fully charged.

ETA: The 2018 thread referenced above makes the same point - change the battery, no warning initially, but then returns within a few weeks.

Edited by Prawo Jazdy on Wednesday 13th July 14:09

Onelastattempt

442 posts

54 months

Wednesday 13th July 2022
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I had the same problem on a 2010 focus, turned out to be the batteries I had bought were cheap Chinese fakes and not genuine Duracell. The fake batteries would last for about two weeks.
I got genuine ones from Argos, a bit pricey but better than risking buying more fakes off Amazon.

CoolHands

19,451 posts

202 months

Wednesday 13th July 2022
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Buy energizer for things like this IMO.

Maxdecel

1,522 posts

40 months

Wednesday 13th July 2022
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Prawo Jazdy said:
........ the warning has gone away in the past after changing a battery. So I didn't think it was a warning that needed resetting, since it went away without a reset in the past. Also, when the battery first ran out on the "main" key, the second key didn't trigger the warning since it was fully charged.
My experience was the same in 7 years of ownership & probably 4/6 batteries as you recall. Same too using the second fob, #1 Warning #2 No problem.