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Discussion Starter #1
i have just bought a used cooper s cabrio and the start stop isnt kicking in i have been to the dealer who have said its the cold weather??? my last mini had no problems even in -12c.. they said come back in a month think i am being fobbed off im only a girl grr. help please.. i have done all the usual checks and no joy. :frown:
 

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Mine stopped working in December and has been back since then for only one day this week (after lots of driving). I wonder if it's telling me the battery is on the way out and it only has a good charge after lots of driving.

But if your previous stop/start kept operating down to -12c, it was faulty - it shouldn't operate below +3c.

The full list of reasons from the manual why the stop/start will stop operating is:
- outside temp below +3
- "inside of vehicle in heat-up or cool-down phase" (what?)
- high outside temp and A/C on
- engine not yet up to temp
- battery knackered
- after reversing
- driver's seat belt undone
 

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My stop /start hasn't worked since before Christmas but has just started working again. I spoke to my dealership and they said it could be the cold weather / lack of use etc. They advised me to take it for a decent run with no lights heater etc (ie charge the battery). Now that it is working I am assuming that they were right. It hadn't occurred to me that the battery might be on its way out!
 

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cold weather would sometimes cause of not starting... and i do believe engine must at least have a decent run or make it start to make it warm even you are not using it. That would really help.
 

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Discussion Starter #5
yippee

well, my car was booked into dealer on thurs 5pm, and on my way home from work 4pm the outside temperature reached the magic 12 degrees and the start stop started working.... grrr...i rang the dealer and ate some humble pie:redface: i hope it is just a temperature thing.. so does this mean there is no start stop all winter??.. i wonder:puzzled:
 

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Mine doesnt do it either! only got my cooper in december and the dealer said the stop/start won't work in cold temperatures, so i've been waiting for it to get a bit warmer. It's been as high as +13 recently but it still never seems to do anything :-S I'm wondering if it's because 90% of my journies are in rush hour traffic where I'm rarely doing more than 10mph. But i do have my heater on all the time too...
 

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I have a Cooper D just over 3 years old with 50k. My stop start is working but it only seems to stop for around 15 secs before cutting back in again, i asked the dealer to have a look at it at my last service, but he said it was fine. I'm convinced it used to cut at out for a least a whole traffic light sequence. Any ideas?
 

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Sorry if this is repeating another post: my dealer advised me to charge the battery and that has got my stop/start working again after the winter.

I wonder in your case if the car is finding after being stopped for 15 secs that the battery condition has got worse and it's then starting the engine as that's what its rules says to do.

It may be that charging the battery would stop this behaviour at least for a while in which case, like me, you would know that your battery is OK but not great.
 

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What do we mean by 'decent run'? I drove mine back from the dealer, around 70miles, and it still wouldn't activate at all. Still won't today. Will it require a few days of driving, or more miles? Or does this simply mean (a) my battery is dying / (b) something is faulty.

P.s. LOVE my new (2011) car! My first mini. FINALLY.
 

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Has it got stop start? mines a 2012 JCW, it doesnt have the system to work to stop start with.
It does, which is why I asked :). The dealer showed me it, it's noted in the spec, the off button is there etc. He said it might take a while / can be intermittent but I would have thought it would work after 70 something miles...
 

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My three-year old SD hasn't been doing it recently, just like my previous Cooper didn't do it as it got older.

Of course, some days have been too cold (it won't work below, I think, 4 deg) but not the rest of the time, so I conclude that my battery is getting a bit tired. Not tired enough to have any other effect and not worth sorting out just to get the stop-start to work - no point spending £50 to make a £5 saving.
 

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My three-year old SD hasn't been doing it recently, just like my previous Cooper didn't do it as it got older.

Of course, some days have been too cold (it won't work below, I think, 4 deg) but not the rest of the time, so I conclude that my battery is getting a bit tired. Not tired enough to have any other effect and not worth sorting out just to get the stop-start to work - no point spending £50 to make a £5 saving.
Good point. For all the stuff they pack in there you'd think there would be a simple battery read out of some sort, to tell us what it is like more accurately.

I'll mention it at its next service (although that's next year), if it doesn't ever work. It's a minor thing, I know, but could be very welcome when driving in cities! :)
 

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you'd think there would be a simple battery read out of some sort, to tell us what it is like more accurately
To be honest, that's what I find the stop/start does -when it works, the battery is having a good day and vice versa.
 

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Did a longer journey over the weekend. I'm not sure at what point it actually decided it was okay to do it, but after around 5 hours of motorway, and 2 through towns/lights, it has decided to now work! :D

Tried it on the way back this morning as well, and it seems it's decided it's ready to work for me now, which was a nice surprise. I guess it may depend upon the age of the car and how long it's been sat waiting to be sold, and the time of year, but in this case "giving it a good drive" did eventually work out pretty well.

FWIW I've probably done around 600 miles since picking it up, and it's just decided it's fine to stop/start now.
 

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I believe the JCW model doesn't have stop/start.

My stop/start hasn't worked in the winter, was fine during the summer months but it is 7yrs old.

I charged the battery up for a few hurs and the following day it did work ok on that one journey, then other day it kicked in at the end of a 10 mile trip and a +13C outside temp.

I've since done 30 mile trips on the motorway and it still didn't kick in at the end.

I've been in new Minis and the stop/start works fine in even in low temps, so it appears mostly related to the battery condition, though is it worth £100 plus to get it working as new again?
 

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...though is it worth £100 plus to get it working as new again?
No, I don't believe the stop/start can earn that back in fuel savings. But on the other hand, the battery is heading towards the end of its life, so is replacing it a bit sooner any more expensive?
 

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Maybe, never had any issues starting over the winter.

I had an 80 mile each way trip up/down the motorway last weekend and on the return journey Stop/Start was working all fine.

Now back to my 10 mile commute and it doesn't kick in until the end of the journey.

I wonder if getting one of those solar battery top-up/trickle charge things could keep it just that bit charged after sitting idle over the weekends?
 

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my stop/start failed but battery went low but still after charge displays fault every time engine is started, can it be reset?
message reads - automatic start/stop failure,engine will not stop or start automatically,if necessary press the start/stop button to start the engine,possible to continue journey,have the problem checked by your mini service
 

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my stop/start failed but battery went low but still after charge displays fault every time engine is started, can it be reset?
message reads - automatic start/stop failure,engine will not stop or start automatically,if necessary press the start/stop button to start the engine,possible to continue journey,have the problem checked by your mini service
start stop will stop working if any fault codes listed in ecu, sometimes a fault that does not flag eml light will prevent it from working, also if battery has gone weak. ie a fully charged battery standing voltage in monitored by the system ie 12.8v if this drops under 12.4v as battery would have a draw on the power while in start stop mode that reduces the standing voltage even more,, batteries tend to fail over time get weaker and weaker as the the chemicals and materials break down so could be enough power to run car but ecu is saving its self as such, either way needs diagnostic scan and battery testing as next steps,, if you leave it and is battery you will prob get to the first very cold night of winter to find the battery will fail totally
 
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