AUDI A5 S LINE 35 TDI - Auto Hold Dis-engaging

[Aliballibee65]

Evening - I've had my A5 S Line for a few months now and so far enjoying the experience. However recently the "Autohold" has started to disengage without me touch the accelerator.

Usual sequence as an example:

• Approach traffic lights
• Stop and green Autohold engages, green A comes on
• As soon as I take my foot off the brake car immediately restarts and begins to crawl forward
• Have to keep my foot on the brake

This doesn't appear to be a setting in, for instance, driver assist but seems to be something that has possibly failed. Its a real pain, especially on hill starts.

Car is due in Edinburgh Audi shortly for a brake fluid change and if its something that needs to be looked at I can add it to the work sheet.

Any thoughts or previous experience of this issue?

Many thanks, Alan

 

 

[Steve Q]

It'll need a diagnostic check to see if any fault codes flag up. It could just be a wheel sensor but but usually/in theory there'd be a hold function disabled or similar warning if the car had picked up a problem. see what Edinburgh Audi says. Keep us posted on how you get on. 

[Aliballibee65]

38 minutes ago, Steve Q said:

It'll need a diagnostic check to see if any fault codes flag up. It could just be a wheel sensor but but usually/in theory there'd be a hold function disabled or similar warning if the car had picked up a problem. see what Edinburgh Audi says. Keep us posted on how you get on. 

Thanks - good to know I can't diagnose it myself. Will let you know after the trip to Edin Audi. Cheers

[Steve Q]

8 hours ago, Aliballibee65 said:

Thanks - good to know I can't diagnose it myself. Will let you know after the trip to Edin Audi. Cheers

Well if you have a code reader it might show fault codes. But clearly an Audi job. 

[Sid2020]

Is the car idling at the correct revs or a little higher then usual, we’ve had a few fords in lately where the throttle pedal positioning sensors were starting to give slightly incorrect readings causing a increase in revs which might be enough to disengage your auto hold, Audi dealer would hopefully find this on a live data check. 
please keep us updated