What is supposed to start a car held on the stop........of stop/start?

 

without me touching anything it will sometimes decide to start, sometimes while i check my phone, do i need a dealer or exorcist?

I think the most common thing in my experience is cabin temperature - if it gets too hot or cold when stopped it needs to start again for cooling/heating. If I know I'm stopped for a long while then I'll turn off the ignition instead.

as above and also battery voltage (make sure your battery is healthy)and low vacuum (may have a small leak if you think it doesn't stay in the stop state for very long) 

Battery voltage?

 

If stopped for a while the DRL's can start draining the battery (dimmed main beam headlight bulbs on the facelift)

 

EDIT - just checked - seems to be a different filament on the main beam headlight bulb!

 

 

 

 

 

Edited 1 May, 20179 yr by bigjohn

I shall try to check these... cars 2 years old, ill defeat the DRL's and turn the temperature down..

 

Bell, Book and a Candle..

The stop / start system is quite a complicated process with a varying number of influences...

 

Conditions for the automatic engine shut down (stop phase):

 

• The gearshift lever is in Neutral.
• The clutch pedal is not depressed.
• The driver has fastened the seat belt.
• The driver's door is closed.
• The bonnet is closed.
• The vehicle is at a standstill.
• The engine is at operating temperature.
• The charge state of the vehicle battery is sufficient.
• The stationary vehicle is not on a steep slope or a steep downhill section.
• The engine speed is less than 1200 1/min.
• The temperature of the vehicle battery is not too low or too high.
• There is sufficient pressure in the braking system.
• The difference between the outdoor- and the set temperature in the interior is not too great.
• The vehicle speed since the last time the engine was switched off was greater than 3 km/h.
• The front wheels are not turned excessively (the steering angle is less than 3/4 of a steering wheel revolution).

 

Conditions for an automatic restart (start phase):

 

• The clutch is depressed.
• The max./min. temperature is set.
• The Defrost function for the windshield is switched on.
• A high blower stage has been selected.
• The START STOP button is pressed.

 

Conditions for an automatic restart without driver intervention:

 

• The vehicle moves at a speed of more than 3 km/h.
• The difference between the outdoor- and the set temperature in the interior is too great.
• The charge state of the vehicle battery is not sufficient.
• There is insufficient pressure in the braking system.

It's always caused by the battery drain - ECU will prevent drop to a level that it can't start engine again.

Mine eventually restarted when I was waiting for a long time in a ferry queue

 

 

Skoda's seem to come with second rate batteries so I'd get a new one

3 hours ago, peterposh said:

Skoda's seem to come with second rate batteries so I'd get a new one

 

Sadly probably true with the MK II - but the huge original battery (Varta I think) is still going strong on my previous Superb I (2003 & 192k miles)

the battery has just packed up on my 64 plate now , grrr

64 plate, are you still under warranty?

 

Take it back.

drove 30 miles today, stopped, engine stopped.... 20 seconds later it restarted, i hadnt touched anything except maybe my phone.

 

 

Its been a warm day, no doubt the interior temperature dropped and the engine was restarted to power the A/C system to maintain the temperature it was set to.

On 11/05/2017 at 19:34, silver1011 said:

Its been a warm day, no doubt the interior temperature dropped and the engine was restarted to power the A/C system to maintain the temperature it was set to.

 

even with fans off?

 

and all lights off too

If you were stationary, literally touched nothing and the A/C system was turned off then it was likely down to a discharged battery or insufficient pressure in the braking system, however both are unlikely after only a brief time without the engine running...

 

Conditions for an automatic restart without driver intervention:

• The vehicle moves at a speed of more than 3 km/h.
• The difference between the outdoor- and the set temperature in the interior is too great.
• The charge state of the vehicle battery is not sufficient.
• There is insufficient pressure in the braking system.

 

Could you have knocked the steering wheel with your knee? When I've done this the power draw from the steering has been enough to start the engine on my Octavia.

Edited 16 May, 20179 yr by silver1011

Given the complexity of the system, there's unlikely to be a simple answer to your question. Drive more, worry less. If it's not flashing warning lights at you it's probably working as it should be.

im beyond worrying, now waiting for my 1st post-warranty EML to pop up