Reprogramming ABS Module - A4 Avant B9

ian.f

Registered User
Ive been a victim
Of the ABS pump :(

pressure sensor replaced - stop start working.

the Brake faulty exist and the code does also: c123efo
Seems like a recurring issue Audi need to solve!

Mine has recently been sorted by ECU testing. My local garage sorted the removal and replace. £420 all in.
**** that we have to do it, but better than £2500+
 

InvincibleA3

Registered User
Seems like a recurring issue Audi need to solve!

Mine has recently been sorted by ECU testing. My local garage sorted the removal and replace. £420 all in.
**** that we have to do it, but better than £2500+

Absolute fuming

is it easy to remove ? I assume car will have to be off road too.

is it reccomended for it to be removed by a specialist ?
 

ian.f

Registered User
Absolute fuming

is it easy to remove ? I assume car will have to be off road too.

is it reccomended for it to be removed by a specialist ?
Easy to remove, I don’t really know. I’ve taken them off on older cars, but didn’t look into this time.
Yes the car needs to be off the road whilst it’s done.
My preference was to have a pro do it. It was ‘only’ a couple of hours labour for a garage to do it, them being the experts.
 

InvincibleA3

Registered User
ECU Tuning - Excellent service - All Good with the ABS module and no more warning light.

the bad news :(

brake pedal creaking when pressed , can anyone help with this ?

car still in the garage so they can figure it out , but all they did was bleed the brakes.

any advice would be great
 

ian.f

Registered User
ECU Tuning - Excellent service - All Good with the ABS module and no more warning light.

the bad news :(

brake pedal creaking when pressed , can anyone help with this ?

car still in the garage so they can figure it out , but all they did was bleed the brakes.

any advice would be great
I have EXACTLY the same issue. It’s off to the garage on Monday for diagnosis...but interested if anyone can shed any light on this.
Have tried lubricant on the pedal bushes etc, but no joy.
 

InvincibleA3

Registered User
I have EXACTLY the same issue. It’s off to the garage on Monday for diagnosis...but interested if anyone can shed any light on this.
Have tried lubricant on the pedal bushes etc, but no joy.

let me know if you find the solution and il be sure to update further on here.
 

ian.f

Registered User
have you had any luck mate ?
Sorry for late reply.
Car has been back and forward to the garage.

This issue has been traced to the master cylinder. The mechanic believes the issue is down to the brake fluid renewal process, whilst bleeding the brake system and brake pedal. We agreed that it was unlikely the abs unit removal/fix was the main cause, but contributed.

So, on to the replacement of said master cylinder. It’s a specialist part that is yet to be “copied” on the after-market. So it has to be Audi-direct order. Audi need to source it from factory, which is outside the UK and now subject to Brexit related delays and costs!
Also, the cost is £300 plus, with the fitting/garage costs on top.

I’ve got the part on order from today, but it’s likely to be 10ish (working) days before it arrives.

I’ll update once the work has been done, and I’m hoping that this will solve the issue, but I’m sure there’ll be a knock on issue somewhere!

In case anyone’s interested, I believe the master cylinder part number is 8W0611021.
 

InvincibleA3

Registered User
Sorry for late reply.
Car has been back and forward to the garage.

This issue has been traced to the master cylinder. The mechanic believes the issue is down to the brake fluid renewal process, whilst bleeding the brake system and brake pedal. We agreed that it was unlikely the abs unit removal/fix was the main cause, but contributed.

So, on to the replacement of said master cylinder. It’s a specialist part that is yet to be “copied” on the after-market. So it has to be Audi-direct order. Audi need to source it from factory, which is outside the UK and now subject to Brexit related delays and costs!
Also, the cost is £300 plus, with the fitting/garage costs on top.

I’ve got the part on order from today, but it’s likely to be 10ish (working) days before it arrives.

I’ll update once the work has been done, and I’m hoping that this will solve the issue, but I’m sure there’ll be a knock on issue somewhere!

In case anyone’s interested, I believe the master cylinder part number is 8W0611021.

ahh man - gutted.

mine is booked for May as i need my car for work and thanks for the part number.

i wont give the garage the answer but i guess it more than likely will be the same issue you have :(

let me know how you get on mate
 

InvincibleA3

Registered User
Sorry for late reply.
Car has been back and forward to the garage.

This issue has been traced to the master cylinder. The mechanic believes the issue is down to the brake fluid renewal process, whilst bleeding the brake system and brake pedal. We agreed that it was unlikely the abs unit removal/fix was the main cause, but contributed.

So, on to the replacement of said master cylinder. It’s a specialist part that is yet to be “copied” on the after-market. So it has to be Audi-direct order. Audi need to source it from factory, which is outside the UK and now subject to Brexit related delays and costs!
Also, the cost is £300 plus, with the fitting/garage costs on top.

I’ve got the part on order from today, but it’s likely to be 10ish (working) days before it arrives.

I’ll update once the work has been done, and I’m hoping that this will solve the issue, but I’m sure there’ll be a knock on issue somewhere!

In case anyone’s interested, I believe the master cylinder part number is 8W0611021.
I forgot to ask , have you got the car back and driving it ?
 

whiteviera

New Member
ahh man - gutted.

mine is booked for May as i need my car for work and thanks for the part number.

i wont give the garage the answer but i guess it more than likely will be the same issue you have :(

let me know how you get on mate
Hi Ian,
Reading through all late in the day, I seem to have jumped through same hoops as yourself. Garage changed sensors but brake fault remains, reckon they need to replace ECU.
Did you ever get the car fully fixed to your satisfaction?
 

ian.f

Registered User
Sorry, been off here for ages!

Car been back abs forward to garage, again!
Been lots of fun!

Very long story short, the new Master cylinder arrived and was fitted. But the juddery braking remained.
The mechanic spoke to Audi to try and figure the issue and it transpired that there’s been a run of defective parts. The end character changes when a new part line is created, and the “A” and “B” variants are defective under certain circumstances.
We need 8W0611021C.
So I now have C on order and hopefully that’ll sort the issue.
I’ll report back as soon as I know!!
 

InvincibleA3

Registered User
Sorry, been off here for ages!

Car been back abs forward to garage, again!
Been lots of fun!

Very long story short, the new Master cylinder arrived and was fitted. But the juddery braking remained.
The mechanic spoke to Audi to try and figure the issue and it transpired that there’s been a run of defective parts. The end character changes when a new part line is created, and the “A” and “B” variants are defective under certain circumstances.
We need 8W0611021C.
So I now have C on order and hopefully that’ll sort the issue.
I’ll report back as soon as I know!!
Hi Mate

glad to hear your hopefully going to conclude this off with the car.

my car is going into Audi end of June to investigate but il be sure to keep in mind about the master cylinder part number..

thanka for the update, il update as soon as i get to the bottom it.

im used to the brake creaking lol
 

Zocko

New Member
Audi A4 2.0 TDI 190ps manual here car is in with same problem and chain of failures that led to the apparently same faulty master brake cylinder.. after they replaced the servo pressure sensor the abs pump and after that the pedal started creaking .. they got the master cylinder on order and I’ll hopefully pick up the car on Wednesday!Thankfully this is done under warranty! I’ll keep you updated cheers!
 

InvincibleA3

Registered User
Audi A4 2.0 TDI 190ps manual here car is in with same problem and chain of failures that led to the apparently same faulty master brake cylinder.. after they replaced the servo pressure sensor the abs pump and after that the pedal started creaking .. they got the master cylinder on order and I’ll hopefully pick up the car on Wednesday!Thankfully this is done under warranty! I’ll keep you updated cheers!
Gutted to hear and glad your getting it sorted.

not long till mine goes in but il assume
Its the master cylinder too.

do you have the part number for the servo ?
 

Campion67

New Member
Hi, my unit also fixed by ecutesting, no faults but have problem with brake pedal, bleeding brakes done with vcds at 03abs, security access 40168 then basic settings and preparation (all systems off) then front brakes, rear brakes, end (all systems on) brake pedal hard but when engine start pedal goes down and it's soft, brakes works and no errors but don't know how to make brake pedal go up and stay hard. Any suggestions?
I seen your based in Scotland I’m having the same issue Audi A4 16 plate sline and I’m wondering who carried out your repair!
 

Awais166

New Member
Hi everyone,

Finally got my car back. I confirm that ECUTesting have managed to clear all faults on the ABS unit for a pleasant £250.00.

My total bill was £765.00, which include the pump unit repair, 3rd party pump testing, brake fluid replace, pressure sensor replacement (which was the initial root cause of all problems) and garage labour to carry out all work.

Audi quote was £3100.00 (without replacing pressure sensor)

My garage quoted initially against Audi and came @ £2750.00 before accepting to go down the route of ECUTesting

For a total saving of about £2k.
Big thank you to ECUTesting and also my garage David Lees Motor Engineering (VW Audi independent specialist).

Hope you all get the same result.
Good luck!
Hi Matt

I got exactly the same problem as your with my Audi A4 - car has done only 18000 miles but unfortunately car just came out of warranty. Audi refused to do any Goodwill.

I am going to go the same route as yours via ECF testing company.

My question from you is : you said pressure sensors were also replaced. My garage person who took the ABS pump out said pressure sensors are within the ABS pump.
when you say pressure sensor were replaced - what do you exactly mean by that ? can you tell me is it a different part outside of ABS pump ?

what do you mean by the cost - third party ABS pump testing ? was pump not already tested by ECF testing when they repaired it ?

Awais
 

Matt S35S

New Member
Hi Matt

I got exactly the same problem as your with my Audi A4 - car has done only 18000 miles but unfortunately car just came out of warranty. Audi refused to do any Goodwill.

I am going to go the same route as yours via ECF testing company.

My question from you is : you said pressure sensors were also replaced. My garage person who took the ABS pump out said pressure sensors are within the ABS pump.
when you say pressure sensor were replaced - what do you exactly mean by that ? can you tell me is it a different part outside of ABS pump ?

what do you mean by the cost - third party ABS pump testing ? was pump not already tested by ECF testing when they repaired it ?

Awais
Hi ya,

Not sure where is thebpressure sensor. Either ways, this needs replacing as it is that sensor that stops working and generate the fatal error code in the pump. The fatal error code in the pump is generated when that sensor fault comes up more than 20 times, if I remember. I believe there is only 1 pressure sensor, at least in my 2016 2.0 TDI Sline.

The 3rd party pump test was just an agreement between the garage and I. This was to ascertain that ECU Testing were not damaging anything during the process. At that stage, not many garages knew ECU testing.

It looks like this pump issue is going viral. Quite disappointed from Audi tbh.

Mine has been fixed since 6-7 months and all good, beside the pedal creaking like the other guys say. Didn't make much of it and will see how the other guys come to conclusion as I have no time for this at the moment.

Good luck bud.
 
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