[mike1967]

Hi my stop start is not working .
All else is ok .
When I make my first stop of a journey the warning light comes on stop start symbol with exclamation mark next to it .
Then warning triangle.
Warning light resets on restart and then comes on again at first stop.
Any ideas ?

if charging battery dont work then needs a scan see what codes are stored. both my past clubmans when i bought them had triangle lit and no start stop, first one was a oil pressure issue causing under boost from turbo as lack of oil pressure to float the shaft,, that one was a spares repair bought car that ended up being a engine out and rebuilt one to take its place,, the second one had same thing put glow plug relay had failed and two glow plugs this caused the dpf filter not to regen and this caused the turbo to fail,, ie ended up new turbo new dpf filter glow plug snapped off in head so head had to come off,, word of warning if glow plugs need changing your best chance t remove them is run engine until fan cuts in then i use a impact gun set on mid force,, never try doing them cold,,
just saying ths not because for one minute saying that yours is any of this but have a open mind when dealing with it,, and those engine must have no fault codes stored at all times as this will block up the dpf filter and cause a lot more damage,,

 

[mike1967]

I recently had this problem with my 2013 R56. I needed a replacement vacuum sensor. My battery was fine.
The sensor was, if I remember correctly, £125!!!!!

the eobd system is very much designed to try and protect the car if one thing dont work correctly, and switches off some feature like start stop and dpf regen.. its the trouble with these new tech cars the eobd system was meant to make things easy when reality is without dealer level diagnostics and live data runs and knowing what the numbers should be is very hard to pin point what has gone wrong, as the key question is always is the code the product of the sensor it points to or a bi-product of a completely different fault,
i had a map sensor implausibility fault a while ago for boost pressure on a turbo car,, checked the wiring the live data nothing sprung out, ended up being oil pump failure or gone weak 15psi oil pressure at 3k not good and the turbo bearing would not float and caused drag in the bearing and then turbo failure about 500 miles later,, the map sensor was doing ot job telling us low boost ie under boost,
bit same as dpf faults can be any fault code in the ecu will stop the regen and cause even bigger issues,, so important that people as soon as get a warning go get it looked at could save thousands if turbo fails due to the dpf blocking cause a diesel runaway that destroys the engine totally,, seen this a lot of times,

 

[mike1967]

Sorted .
It was the vacuum sensor .
The dealer I bought the car from came and collected it they took it to their garage scaned it and fitted the new part .
Also having new injector seals fitted all under their warranty .
They are delivering the car back on Saturday .
Great service .

like said in that other post should ask them at least to change oil and filter at same time, as leaking injectors will load oil and fact that car has not been regen the dpf filter due to a fault code for pressure sensor stored would be a very good thing to do, as its a warranty job they might want to save a few quid by not doing it,

 

[mike1967]

Thanks ,spoken to them and they are changing the oil and filter .
They are also fitting a new acoustic pad .

Before .



After cleaning.



Should be back from Worcestershire to St Albans on Saturday .

happy days