Audi A7 Start/Stop system fault / Function unavailable

[Gaby85]

Hi, I have Audi A7
Today I drive the car around 30 miles I lefted in the garage…after 2/3 hours wen I wanted to go
And i got this message on my dashboard.
Start/Stop system fault / Function unavailable

What can be the problem?
Any help please, thank you

 

[aj84]

How long has it been sat for?
Might be worth checking your battery and whether it is depleted/heading that way

 

[Gaby85]

How long has it been sat for?
Might be worth checking your battery and whether it is depleted/heading that way

After 2/3 hours I wanted to use again
Obviously the car is starting without problems, just that the engine marker is on and the error start-stop system fault function unavailable

Thank you

 

[Gaby85]

How long has it been sat for?
Might be worth checking your battery and whether it is depleted/heading that way

I look around and everyone is talking about the battery is low

 

[aj84]

Ideally you need to get the car scanned to see if there is more information logged.
Reason I mentioned battery is I had this issue with my A7 back in the day and it was indeed the battery

 

[RAF_S7]

The Start/Stop function monitors various car parameters, before deciding if start/stop function is available.
this includes:

• Battery cranking voltage
• Engine temperature
• Cooling fan operation
• Battery load, including lights, aircon, MMI, heated seats etc.
• Ambient air temperature
• Alternator charging voltage

A failure in any one of these will prevent start/stop operation for safety reasons.

if start/stop in not available following a period of parking, then your battery voltage is too low. This is caused by an aged battery bit holding its charge, or the alternator is not delivering a full charge.

How old is your car, has the battery been replaced (and coded) in the last 3 years?

if car is over 5/6 years old, I’d start by either replacing the battery, or getting the car scanned for fault codes.

John

 

[Gazwould]

Stop Strain is ment to save you £ except it doesn't it costs money to get it to function properly and the earlier wearing of certain components , best not to have it working .