Stop start not working after being at dealership

No probs with electric cars. The problem is cutting the engine when the turbo may have just been working hard so may get oil starvation, and constant restarting of an engine which causes wear. I'm not against green tech but these short term emissions reduction technologies take no account of the emissions created in prematurely replacing components and engines. You're just pushing the problem down the line and the financial cost of this is passed to us, the vehicle owner.
Nah we are old school, after 3 hours on the motorway we will try to pick the last half hour of our route usually to allow the turbo etc to cool. Too many years of having smart cars which are very prone to engine failure due to people abusing them and I didn’t want a massive bill. I see it like a race bourse, you don’t run it at full pace and then just stop it, you always see them running them gently to allow them to cool in a controlled manner.
 
Hi @BRABUS . Apologies for not explaining fully what I meant.

Watching F1 on catchup!

Just curious to know if start-stop would still operate if/when you put it into Park?

Might help with diagnosing if fluid change and now softer pedal has contributed towards issue?
This has me really interested, please can you give me a bit more detail of what you are suggesting we try and what we may expect and then we can report back
 
This has me really interested, please can you give me a bit more detail of what you are suggesting we try and what we may expect and then we can report back
Of course;
With Start/stop activated my engine stops when vehicle comes to a stop and I have my foot on the brake pedal.

What annoys me is that if I then put DSG into neutral and use the handbrake, as soon as I take my foot off the brake pedal, the engine restarts.

So, I tried putting it into Park, with the handbrake also on.
When I took my foot off the brake pedal the engine didn’t restart.

Just curious to see if Start/stop does the same for you?
Andy
 
I’m old school and was taught to not leave vehicle in gear when stopped;

Wear on clutch & thrust bearing.
Dazzle people behind.
Overheat and warp brake discs.

I’ll now await alternate views from other members!
 
I’m old school and was taught to not leave vehicle in gear when stopped;

Wear on clutch & thrust bearing.
Dazzle people behind.
Overheat and warp brake discs.

I’ll now await alternate views from other members!
And you won't fail your driving test by applying handbrake and selecting neutral as you would holding it in gear. A bit more of a moral quandary with DSG though
 
Ok so reply from the garage this morning. Anyone else van work when the steering wheel isn’t straight? This is the reply below.

1742806828680.jpeg
 
No probs with electric cars. The problem is cutting the engine when the turbo may have just been working hard so may get oil starvation, and constant restarting of an engine which causes wear. I'm not against green tech but these short term emissions reduction technologies take no account of the emissions created in prematurely replacing components and engines. You're just pushing the problem down the line and the financial cost of this is passed to us, the vehicle owner.
Son in law’s X1 Beemer, 4 yrs old, just had to have a new starter motor £600. Neighbour’s son’s Q7 needs a new alternator/starter, (apparently it’s all one combined unit) just out of 3 year warranty, £2500. Dealer says it’s a common issue. The last time I ever had to change a starter motor on a vehicle was 30 years ago on a series 3 Landrover.
 
Sounds like utter nonsense to me, the only time my doesnt stop is if the airblower is switched on above 3, other than that I can have everything on and it still works.
This is exactly how ours worked before it went into the dealership for standard service interval works
 
Dealer is now saying it will be another 5 weeks this Thursday before they can fit us in again for more diagnostics. They also said that as the warranty expires on 30th March that any work will not be covered by the warranty. WTF 🤬 😡
 
  • Wow
Reactions: CAB
Have you tried to play the disabled card and ask Motability to assist? They may be able to put pressure on.
Do you have access to another dealer close to you?
 
I contacted Motability and they said see if you can take it to another dealer. This dealer is Derby, so I rang Sheffield which is the next nearest, they can fit us in in 2 weeks. I have no idea what is going on at Derby just lately but it doesn’t make you feel very reassured.
 
Dealer is now saying it will be another 5 weeks this Thursday before they can fit us in again for more diagnostics. They also said that as the warranty expires on 30th March that any work will not be covered by the warranty. WTF 🤬 😡
That’s bollocks. If the fault was reported before the warranty expired, then it’s covered. The fact that they are unable to deal with it until after the warranty expires, is their problem not yours. Stand your ground.
 
"So, here is your new van, Sir. I hope you enjoy every minute of it.
Just to pre-warn you, our workshops are fully booked for 3 years, so any faults that you might experience can be dealt with after that period. (at your own cost)"
 
I will give a few of these things a try next time I am out in the van, but your dealership sounds like they need some training in after sales service.
Well, I have just been out in my van and can report the following:
Stop/start works with the wheels turned
When I put it in park it worked
When I removed my seatbelt it didn't work, however
When it worked and engine was "stopped" I took my seat belt off and the engine stayed off.

So essentially don't believe anything the dealer tells you.
 
we get that annoying A in a circle on the dash.
I would take the symbol as an indication that stop-start is well alive and just messaging being busy with other things and thus can't stop the engine at the moment.

Besides the mentioned battery state etc. the ECU every now then needs a few minutes to run engine's self-diagnostic routines. The most noticeable/obvious one is EGR system self-diagnosis/learning which needs quite a few minutes to accomplish - usually accumulated over several stops - engine seemingly for no reason doesn't stop.

I would expect that also NOx reduction system needs every now and then some time for diagnosis.



Anyways, late T6.1 engines (engine codes Dxxx) actually keep timestamped records of the few latest (6?) stop prevention reasons. Below a snippet of a log of a fairly new one (3000 miles/5000 km).

T6.1 DNAA Man (202305100947)IDE06307
Stop prevention history data
Year
Month
Day
Hours
Minutes
Seconds
2023202320232023
5555
5544
1271616
15275218
30335719
Engine temperatureEngine temperatureEngine temperaturenot activenot active
Ambient air pressurenot activenot activenot activenot active
Brake under pressure too lowBrake under pressure too lownot activenot activenot active
Sporadic function preventionnot activenot activenot activenot active
Poor start detectionnot activenot activenot activenot active
Mixture adaptationnot activenot activenot activenot active
Regeneration Modenot activenot activenot activenot active
hood opennot activenot activenot activenot active
Steeringnot activenot activeSteeringnot active
Steering anglenot activenot activenot activeSteering angle
Driving situationnot activenot activeDriving situationnot active
Anti-play protectionnot activenot activenot activenot active
Function locked due to frequent stallingnot activenot activenot activenot active
Brake pedal information: plausibilitynot activenot activenot activenot active
Slow traffic detectednot activenot activenot activenot active
Hybrid battery performance too lownot activenot activenot activenot active
Auxiliary equipment power consumption too highnot activenot activenot activenot active
Deceleration takeover activenot activenot activenot activenot active
E machine output too lownot activenot activenot activenot active
Clutch protection K0not activenot activenot activenot active
Learning function activenot activenot activenot activenot active
Engine protection activenot activenot activenot activenot active
Fuel gelling protection activenot activenot activenot activenot active
Diagnosis of exhaust systemnot activenot activenot activenot active
Exhaust treatment diagnosisnot activenot activenot activenot active
Air system diagnosisnot activenot activenot activenot active
Thermostat testing not completednot activenot activenot activenot active
DTC memory entry in engine control modulenot activenot activenot activenot active
Restriction in start systemnot activenot activenot activenot active

Besides the above also frequnecy counters of the events are stored - see below.



Earlier T6.1 engines (Cxxx series engines) provide only frequency counters of prevented events (no timestamped data). Below a snippet of one at 11000 miles/18000 km.

T6.1 CXHA Man 4M (202303281652)
Number of prevented stop processes-Steering angle0
Number of prevented stop processes-Steering137
Number of prevented stop processes-Anti-play protection0
Number of prevented stop processes-Ambient air pressure0
Number of prevented stop processes-Sporadic function prevention0
Number of prevented stop processes-Poor start detection0
Number of prevented stop processes-Diagnosis of exhaust system0
Number of prevented stop processes-Mixture adaptation0
Number of prevented stop processes-Air system diagnosis0
Number of prevented stop processes-Hybrid battery performance too low0
Number of prevented stop processes-Auxiliary equipment power consumption too high0
Number of prevented stop processes-Deceleration takeover active0
Number of prevented stop processes-Clutch protection K00
Number of prevented stop processes-Thermostat testing not completed0
Number of prevented stop processes-Driving situation0
Number of prevented stop processes-Engine temperature38
Number of prevented stop processes-Regeneration Mode128
Number of prevented stop processes-Brake under pressure too low4
Number of prevented stop processes-DTC memory entry in engine control module0
Number of prevented stop processes-Learning function active0
Number of prevented stop processes-hood open0
Number of prevented stop processes-Function locked due to frequent stalling0
Number of prevented stop processes-Brake pedal information: plausibility0
Number of prevented stop processes-Slow traffic detected0
Number of prevented stop processes-E machine output too low0
Number of prevented stop processes-Engine protection active0
Number of prevented stop processes-Fuel gelling protection active0
Number of prevented stop processes-Exhaust treatment diagnosis0
Number of prevented stop processes-Restriction in start system0
-
Number of requested start processes-Steering9
Number of requested start processes-Engine temperature too high0
Number of requested start processes-Engine temperature too low0
Number of requested start processes-Sporadic function prevention0
Number of requested start processes-Hybrid battery performance too low0
Number of requested start processes-Auxiliary equipment power consumption too high0
Number of requested start processes-Deceleration takeover active0
Number of requested start processes-Brake under pressure too low12
Number of requested start processes-SCR System requires restart0
Number of requested start processes-CAT heating0
Number of requested start processes-hood open0
Number of requested start processes-Rolling vehicle102
Number of requested start processes-Engine protection active0
Number of requested start processes-Fuel gelling protection active0
Number of requested start processes-Restriction in start system0
 
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