Stop start error

[Bobbydaisy]

New van ,21 plate Ducato Elddis CV20, started van to move to new site and has Stop/Start error message , also light on panel below right of steering wheel showing light illuminated for Stop/Start . Pushed button on the panel and tried restarting van and error showing still. Stop:Start not operating when stopping at traffic lights etc , drove about 80 miles and at new site, still got error , any ideas ? Thanks .

 

[kevenh]

My nearest similar Stop/Start issue is car based. My Mazda 3 would not stop when I came to a halt if the battery was under load and/or less than optimally charged.
A big difference is that I had no related alarms. Just no S/S feature. Spring and it's warmer & more sun light days usually sorted the battery condition!

Have you any battery or electrical issues?

 

[Bobbydaisy]

Just been having a look , battery is ok , nothing I can see loose etc, new van just over 2.5k miles and just done 80 miles so fully charged , maybe sensor fault ?

 

[jockaneezer]

My car doesn't have the warning lights, but if we haven't driven it for a few days, the stop/start doesnt always work at first, to protect the battery. If you've been parked up for a few days, this might be your problem too ? I don't think driving 80 miles will put that much charge into your battery, especially if it's having to run other things like drl's and possibly your fridge too ?

 

[Guyadria]

Start stop message on Ducato can accompany another failure, such as Engine Management Light caution. Any other warning lights on? Happened to me when DPF sensor failed and triggered EML.

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[Reallyretired]

Swmbo car has this feature, and the stop bit doesnt happen if the aircon is on or if the engine isnt warmed up..

 

[Bobbydaisy]

Start stop message on Ducato can accompany another failure, such as Engine Management Light caution. Any other warning lights on? Happened to me when DPF sensor failed and triggered EML.

Yes engine management light on also , and A with circle with dash through it , but actual error message on dash display says start/stop fault

 

[Bobbydaisy]

My car doesn't have the warning lights, but if we haven't driven it for a few days, the stop/start doesnt always work at first, to protect the battery. If you've been parked up for a few days, this might be your problem too ? I don't think driving 80 miles will put that much charge into your battery, especially if it's having to run other things like drl's and possibly your fridge too ?

Fridge runs off leisure battery?? DRL’s yes but that’s about all that was on , voltage was good when I checked today but will check again to see if drop occurred. Have stop/start on my car , agree it doesn’t work when load on battery has been high , really only works on or after longer journeys, but doesn’t give error message.

 

[Guyadria]

In which case I strongly suspect it is the DPF sensor. Fiat are well aware of problem and they have been failing at around 2000 miles. Fiat dealership can reset and order replacement. If you have auto box it alsondrops to Eco mode.

 

[Bobbydaisy]

In which case I strongly suspect it is the DPF sensor. Fiat are well aware of problem and they have been failing at around 2000 miles. Fiat dealership can reset and order replacement.

Yeah , agree ,have read about this on more than a few occasions , and kinda expected it though it’s odd it’s giving wrong error message but tend to think your right . Will get OBD reader plugged in and get error code and compare to the list I downloaded for the codes. Thanks everyone for the input , much appreciated .

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[jockaneezer]

Bobbydaisy, I have heard of fridges running off the leisure battery, but think they might be in the minority as most run direct from the alternator while driving ? ( Lenny HB may know more about them ?) But at the end of the day, the leisure battery will be sharing the charging from the engine's alternator whilst your driving (and maybe then supplying the fridge ?)
Guyadria has a good point, something I wasn't aware of and a visit back to the dealer or Fiat assist looks like the next avenue to explore ?
Good luck with getting it sorted out though.

 

[pappajohn]

Mine stopped working at all.
Turned out to be the battery.
It was showing fully charged but the capacity was down to 65%.
Charged the battery on my garage charger for 24 hours then it worked for a day then stopped again
New battery and works every time if the operating parameters are met.

 

[Old Gibber]

On a new Fiat the most likely problem is the exhaust gas sensor. There have been loads failing on new Fiats (including mine) as it seems there has been a bad batch of them. It will give exactly the symptoms you describe and seems to happen at around 2000 miles. It is driveable, but only on lowish revs. Take it to a Fiat dealer ASAP. Their diagnostic check will soon identify it, and it takes them less than half an hour to replace.

 

[Old Gibber]

In which case I strongly suspect it is the DPF sensor. Fiat are well aware of problem and they have been failing at around 2000 miles. Fiat dealership can reset and order replacement. If you have auto box it alsondrops to Eco mode.

Exhaust gas sensor, not DPF sensor.

 

[Lenny HB]

most run direct from the alternator while driving ? ( @Lenny HB may know more about them ?)

3 way fridges normally run of the alternator when driving, Hymer's have a relay in the EBL that allows them to be run off the leisure when the engine is stopped.

The OP has a PVC so probably a compressor fridge, with the lower current they use probably wired only to the leisure battery.

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[Old Gibber]

The OP has a PVC so probably a compressor fridge, with the lower current they use probably wired only to the leisure battery.

Not necessarily, my PVC has a 3 way absorption fridge.

 

[Jev88]

I was told there are at least 18? things being monitored by your engine ecu and if even one of them is not fully happy it won't let the start stop feature work.

 

[pappajohn]

Best thing to do with stop start is turn it off.
It does your battery no favours restarting at almost every junction and set of lights

 

[kevenh]

Best thing to do with stop start is turn it off.
It does your battery no favours restarting at almost every junction and set of lights

Maybe on the oldest vehicles with S/S but soon ways to smooth the battery loading were added.

Some car manufacturers use fuel combustion to restart the engine and not even the battery

You won’t be hearing the starter motor crank the engine and loading the battery.

 

[Raul]

Maybe on the oldest vehicles with S/S but soon ways to smooth the battery loading were added.

Some car manufacturers use fuel combustion to restart the engine and not even the battery

You won’t be hearing the starter motor crank the engine and loading the battery.

Not on diesel, it needs compression to ignite, starter engages when you press the clutch.

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[kevenh]

Not on diesel, it needs compression to ignite, starter engages when you press the clutch.

Good point. The engineers have thought of that fuel difference and have that diesel compression restart down to one cycle.
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So far I’ve only driven S/S vehicles that have petrol engines but those aren’t using the starter motor

 

[jockaneezer]

The stop/start on my diesel Volvo annoyed me at first. I thought "I wonder if they've upgraded the starter motor to handle all this extra cranking ?" and you could have been doing a few high speed miles on the motorway, only to come off to traffic lights on a junction and the engine would switch off, immediately stopping the oil supply to a toasty warm turbo ? I leave it switched on now otherwise the emissions light comes on at every possible opportunity and I have to put Redex additive in the next two or three tankfulls to get it to clear.

 

[PP Bear]

I had a brand new Kia, with SS that wouldn’t work. Turned out to be the battery, it might have been a brand new car, but the battery wasn’t and needed replacement.

Best check the alternator output at the battery, then again with all lights on, fog on, indicators, heater etc, then read again. Then wait and see if the battery drops it’s charge.

 

[kevenh]

The stop/start on my diesel Volvo annoyed me at first. I thought "I wonder if they've upgraded the starter motor to handle all this extra cranking ?" and you could have been doing a few high speed miles on the motorway, only to come off to traffic lights on a junction and the engine would switch off, immediately stopping the oil supply to a toasty warm turbo ? I leave it switched on now otherwise the emissions light comes on at every possible opportunity and I have to put Redex additive in the next two or three tankfulls to get it to clear.

From the ECU the temperature of the engine is a parameter used for the S/S use.
But you’ll have to use real life knowledge of your vehicle on using its S/S

 

[John Barrett]

I turn it off whatever vehicle I'm driving. Hate the damn thing!

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[bigwood]

As others have said battery voltage is critical with stop start systems. Our daughters Mini had nothing but trouble with SS that dealers couldn’t sort. Once the warranty ran out she switched to a local garage that offered to try a new battery to see iff it helped. The loan battery was bigger capacity than the one fitted by BMW and it cured the fault.

 

[kevenh]

I turn it off whatever vehicle I'm driving. Hate the damn thing!

what is there to hate?
When you’re stationary with the engine on you’re getting 0 mpg.
With S/S, my 2lt Mazda always got >40mpg on a M4 & A4 commute

 

[John Barrett]

He who hesitates causes accidents, especially when pulling out of junctions!
I just dislike it.

 

[Odd-no-more]

On balance I think the extra wear and tear has a greater cost than the fuel it saves, unless I am going to be stationary for a long period I switch it off.

 

[kevenh]

On balance I think the extra wear and tear has a greater cost than the fuel it saves, unless I am going to be stationary for a long period I switch it off.

How do you get more wear and tear with an engine off?
You’ve read earlier posts outlining associated tech that bypasses starter motor use (petrol) or efficiency gaines in compression starts (diesel)?

You do need to expect the engine to stop when you come to a halt but I don’t see how there’s a accident waiting to happen at junctions.
Esp. If you assume the engine is stopped and you go when starting the engine when lifting the clutch, etc. has started the engine.
Most of us can adapt to S/S quicker than switching between manual and auto gearboxes. IMO