A5 2015 vehicle sometimes won’t start

[NickA5owner]

I Have a 2015 (64) A5 3.0 V6 TDi sportsback. Having some intermittent issues with vehicle starting. 67k millage it’s well serviced ive had it from new.


Sometimes put key in ignition, foot on break and all doors closed. press key in to start vehicle and will not turn over. No electrical signal being sent to say start car. When this happens the brake pedal is rock hard there is no movement in the pedal as you would usually expect to see.


Normally to over-come this issue. I remove the key and Re-insert the key press brake again and will fire up. But today 5 times I tried and won’t start. Vehicle in in park, hand brake on but brake pedal is hard and up fully with no movement. Even tried getting out the car, lock doors / unlock and sit inside and try again to no avail.


Called the AA out but by time her arrived I tried starting it again and just fired up 1st time. The break pedal was hard at this time but as vehicle fired up the pedal then pressed down and was functioning as normal. (some negative movement)

No warning lights on dash when this happens or unusual symptoms apart from the firm for brake pedal when fails to start.

Nothing was showing on AA’s dynostic he ran there were no markers on his software. Vehicle is now running / starting fine. Until next time...........


Seen utube videos showing similar issues out there but nobody with any solutions..


Any advise is appreciated. TIA

 

[I oOEddOo I]

Maybe is worth a trip to your local audi dealership if is still under warranty.

 

[NickA5owner]

Just out of warrenty so hoped some one out there had seen similar issues......

 

[JulianW]

Bit of a left field one, but have you tried replacing the battery in the key fob? I know weird things start to happen when these batteries start to die, and this may be related.

 

[RAF_S7]

Are you getting electrics to all the usual places, before pressing start?

i.e. Dashboard warnings, radio etc?

 

[NickA5owner]

Bit of a left field one, but have you tried replacing the battery in the key fob? I know weird things start to happen when these batteries start to die, and this may be related.

I will use the spare key for a week or 2 see if it repeats. The battery in modern keys are apparently not replaceable or removable without damage to the key itself. They self charge when in the vehicles ignition.

 

[NickA5owner]

Are you getting electrics to all the usual places, before pressing start?

i.e. Dashboard warnings, radio etc?

Believe so, usually it started on the 2nd attempt so didn’t pay much attention to other systems to kick in or not. But I never noticed anything odd apart from the brake pedal being hard.....will watch out next time to see status of the other systems.

 

[NickA5owner]

With 2 weeks using the spare key and NO further problems have been experienced. Probably Need to go to dealership and re-programe both the keys as new! Technology at its best!!!