Nicholas fraser

Taken the car to the garage because it had an AdBlue fault and I told the garage there was no OBD. just got a phone call from the garage and said they have found it after an hour of taking the car dash apart it hidden in the wheel arch…. And says he’s never seen something like this in his life.also came back and said I need a new AdBlue system £1600 and it’s a known problem with the A4 (b9) Thanks Audi 

16 minutes ago, Duke Dukington said:

 

Your car has a seperate adblu tank. It's used to help with emissions. The tank is nearly empty and needs to be filled. On my car, you'll find the filling point next to where you fill your car with Diesel (it's the blue coloured cap) Most cars take 12 litres, but some have a 24 litre tank.

You can buy Adblu from most petrol stations - some even have a Adblu pumps, but I've not come accross any

The AdBlue tank is full it only appears in the morning on a first drive then goes away for the rest of the day. Think it’s a dodgy sensor  

A bit off topic but doesn’t anyone know anything about this problem A4 Allaroad (B9) 

I bought mine from here but the stock level are all out and they have no idea when they will be in due to this part shortage around the world https://www.onlinecarparts.co.uk/oenumber/5q0906207.html

Hahahaha it’s really getting to a joke. Shame on Audi 

I don’t know if it’s worth waiting for my appointment or just doing it my self but my only other problem is I have to obd plug and I want them to figure that out too whilst it’s under warranty and I have looked everywhere for it and behind the panel

2 hours ago, DevQ7 said:

Do not drive it. I was unaware of how this fault can lead to the abs control unit faulting after a certain number of miles / uses. I now am looking at almost £3k to replace the entire abs control unit and mechanical arm for something which should have only cost about £100.

I’ll be driving it to the garage but that’s it and I’ll probably be coasting it 😂

51 minutes ago, alo said:

Hi Nicholas,

I had the same issue stared on the 5th June 2021 and it was fixed on the 9th June 2021.  The car has been driven for approx. 100 miles during this time.  Based on this thread, I would suggest to get it fixed as soon as possible. To get it fixed, you will need to replace the brake servo sensor 5Q 0906207B.  Here is a video I made to how to replace it:

For more information, please refer to Page 9 of this thread. I hope it helps.

Ambrose

Thank you since I bought the car only 3 weeks ago it’s still covered under Evans used car warranty so it’s booked into an Audi specialist they use. I would do it my self but if it’s getting done for free I’ll have to wait 

Just bought a A4 Allroad 2017 and just got the message of Brake Servo: restricted phone the garage and they said not to drive on it bra sue you only get so many  activations until it fails and your car seizes. Anyone know roughly how many that would be ? because I’ve had to use my car in emergencies for work

Phoned my local Audi dealership and they have said it should be where that’s hole is in my picture so someone has removed it or Audi have somehow not put one one but I don’t know how they could have serviced the car without one 

51 minutes ago, audia4b5kev said:

is it at  end  of the consel  back ashtry  flip up lid    strange one this    kev

Nope just two USB ports and a AUX and under the rubber mat is just a place for the key to go in if the car won’t start on the button. Have no idea where it is 

19 minutes ago, audia4b5kev said:

try  behind  ash  tray  bud   or  center consle 

32 minutes ago, Shytot said:

It looks like the obdll is missing. 

Is the footlight on the centre console side of the panel {the obd is closest to the bonnet release)? 

Either way there should be some evidence of the connector /cables. 

I guess you went through something like this to get access 

https://m.youtube.com/watch?v=c5RuCb5DCZI

 

Nope it was just two bolts on each side of the steering column and it just popped off but there was nothing behind the panel, no cables or sign of anything. Big mystery. Unless they do it all wireless now but I highly doubt it.

17 minutes ago, audia4b5kev said:

try  behind  ash  tray  bud   or  center consle 

Nope nothing 

Nope nothing there, even looked under all the little rubber mats in all the we pockets it has in the centre console. 

Nope it was just two bolts on each side of the steering column and it just popped off but there was nothing behind the panel, no cables or sign of anything. Big mystery. Unless they do it all wireless now but I highly doubt it.

I have seen all the videos of the port being on the right hand side of the foot well but there is just a hole where it’s looks like it should be so I took the plastic tray to see if it was hiding up there but it wasn’t there. Anywhere it could be or has someone taken it out ? A4 Allroad 2017