FezMan

Auto Stop/Start not working

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I've been wanting to avoid posting this due to it probably being 'another' of these posts on this topic

I've had my Focus around 2 weeks now, and not once has the auto start stop worked for me. I just get the greyed out (A), and then if I go into the vehicle info it says its not working due to the battery charging.

Now its been 2 weeks and its till saying this and the vehicle has been driven obviously multiple times, how long am I supposed to give it before I decide there's a problem?

Or is there anyway I can sort of 'reboot' it into action. Ive had the drive mode In normal and eco and neither are triggering it.

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2 minutes ago, alexp999 said:

Journey length?

Its had fairly decent journey lengths, but by that I mean normal 20/30 minute daily drives. My previous fiesta though it would work pretty much within 5 minutes.

I have a feeling the Ford dealer I purchased from had it for around 1 month where it might have been sat not doing anything which probably hasn't helped. Although it was a good 2 hour drive home from there when I picked it up.

I think ill find an excuse to go on a long drive this weekend and see if that helps, but like I've seen somebody say already, a long motorway drive isn't apparently something that would kick it into action 😞 

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battery is probably a bit low from where it's been sat around and it's a cooler time of year, which usually increases your electrical load.

Might need to charge it manually if you want to save yourself some long journeys to top it up.

It's not going to be worth the fuel saving though to get it working.

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Just sitting in the car with the ignition on, doing updates, playing around with settings like we all do when getting a new car etc has a big power draw in these cars. It may take some time before things settle down.

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Just think of the wear and tear you're saving on your starter motor and ring gear. Our Mk3 only worked sporadically for a week or two after we bought it and then didn't work for around 5 years until I recently replaced the battery and reset the BMS.

You could try giving it a good charge, if you're in a situation where you're able to do that, then resetting the BMS.

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Cheers guys,

luckily its not something that actually effects the car in any form so I think ill just leave it then and see if it sparks back to life

the battery shows no signs of being drained or anything but like you say with the amount of tech on cars now its probably been working overtime 

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On my current car (not a Ford but same principle). the stop/start stopped working. I ended up doing 1 180 mile round trip and then A 300 mile round trip before it started working again. However, it now does not work as have only been doing short journeys recently. If it is greyed out though then that might indicate a problem wit the system. Mine was green but just flashhes.

 

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Try this worked on mine
turn the car on for 10 seconds, press fog lamp switch 5 times, then press hazard switch 3 times. when the battery light flashes, turn the ignition off

Sent from my SM-G950F using Tapatalk

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Stopped working on my MK4 Focus. My previous car's, BMW's, i never once had an issue with the START/STOP not working.

Just add the START/STOP to the ever-growing list of weird things that don't work or work when the wind is in the right direction!!

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Mine's hardly every worked, not that I care.

Weirdly though even when I did similar journeys to the missus, her Fiesta SS would always work, and has always worked in both the Mk8s she's had so far.

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13 minutes ago, Guy Heaton said:

Mine's hardly every worked, not that I care.

Weirdly though even when I did similar journeys to the missus, her Fiesta SS would always work, and has always worked in both the Mk8s she's had so far.

I usually turn mine off on the Fiesta anyway, but on the odd occasion I forget to do so, it always seems to work, even at times when I get this message, presumably because the battery is low. Weird, indeed!😃

20190220_095534.thumb.jpg.453971c0fc7114dad5ab3537348d759a.jpg

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Focus seems to have a real issue with it's BMS functions in Mk4 Focus. It affects the Nordic countries most IMO, since during the last winter, ppl (including me) were experoiencing issues with fuel aux heaters not working (with me even in mid-august) on a cold morning, and battery SOC dropping even to 40-55% even if the car is run regularly. Ford is not always replacing the BMS sensor/module at the moment, since it would only help for a while, maybe from days to months. They're searching and waiting for a full fix.

Also, one of the symptoms is S/S not working due to low battery SOC and system not charging the battery properly. One option would be to detach the BMS sensor off from battery negative terminal connection.

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