Audi Brake System Fault - C123EF0 Brake Booster Failure

BRAKE SYSTEM FAULT STOP CAREFULLY - is a warning message often caused by an ABS pump malfunction for the later generation Audi’s which will also cause brake booster failure fault codes to be stored.
Once triggered, the fault code C123EF0 - Hydraulic Brake Booster Limit Value Reached will cause the ABS warning light to become constantly illuminated, both of which will remain unclearable.
We are seeing large numbers of these Bosch ABS units, across a range of Audi models, failing in this exact way.
Common Failure symptoms:
Brake warning on the dash: ‘Brake system fault stop carefully’
ABS warning light illuminated
C123EF0 - Hydraulic Brake Booster Limit Value Reached
If you have problems with your Audi ABS be sure to check out our link below:
www.ecutesting...

[@barry1-m1d]

Hi is this fault on valve block or circuit board, what needs sending in thanks .

[@Sandokanbattles2]

I have this fault, but brakes Working normal, as usual, first I had yellow warning light -break servo restricted, then after few weeks of driving with this, the red warning light appears with this code. Do you know why breaks working normal, maybe is just some sensor broken?

[@Ecutestinglimited]

Hi. If possible, could you scan the vehicle for any current fault codes you may have and send them to our technical support team at [e-mail], along with your make and model of vehicle and the symptoms of your fault as you have listed above. It's possible your ABS module is faulty, but a vehicle scan would potentially confirm this. Thanks

[@mohamedelshamy2706]

Hi Tim, I have two questions about about for your services : 1- do you accept our sending from the Middle East ? 2- What exactly means by Life-time warranty period ? Thanks.

[@Ecutestinglimited]

Hi. Yes, we offer a worldwide service so you can send your unit into us no matter where you are located! Our lifetime warranty covers all manufacturing or work defects for the unit for life, you can see full details of the policy on our website: www.ecutesting.com/lifetime-warranty/ Hope that helps!

[@patrickhealy9167]

Hi, I have the exact problem which you describe in your video with the same fault code etc. I am based in Dublin, Ireland, can I send my unit to you for repair. If so what is the best way to send it, DHL, Fastway etc. Are there any issues with Brexit? I appreciate your time and look forward to your reply.

[@Ecutestinglimited]

Hi Patrick, you are definitely able to send your unit into us. Select your car model or part number from this page: ecutesting.com/common-faults/audi/audi-abs-brake-booster-fault/# and fill in the online re-build test form.
If you have any concerns with shipping then feel free to contact our office on 01773 535638. Thanks

[@philgriffin483]

Hello, I am also in Dublin, did you use this service? If so can you tell me full cost please. I have the same error

[@Ronanlynch26]

@@philgriffin483 hi phil how did you fair out with this problem after?

[@saeed3184]

My audi a4 2016 shows the same problem but the brakes works fine and normal but the error code is not clearing up ..

[@whaatspot8615]

Do you require whole unit to be delivered for repair or just electronoc ecu part?
2016 AUDI A4
C123EFO

[@Ecutestinglimited]

Hi. We would require the whole unit to be sent in for a re-build.

[@user-yv9ki4yr2m]

nice nice very nice bravo bravo

[@user-zc1ks5ho6m]

Hello
I have same problem
Do you have any place in uk
I will bring it my car to fix

[@Ecutestinglimited]

Hi. We are located in Derbyshire in the United Kingdom, however we do not offer a removal or re-fit service as we only work on the ABS module itself. We would recommend getting your unit removed by a qualified technician/garage and then sending your unit into us. Thanks.

[@sic-]

Why is he wearing gloves that aren't ESD-safe while handling sensitive electronics? Blue nitrile gloves will happily generate static electricity and can easily damage semiconductors. Most ESD damage doesn't instantly kill a device but will shorten its life and cause premature failure.

[@adampickering1983]

This has happen to my Audi a4 after having front pads replaced. Did having my brakes replaced cause this or is it a coincidence

[@LioMan]

coincidence mate

[@karthikdeva6516]

Latest vechile this unit complient possible

[@ionutdan9258]

I got the same faulty

[@karthikdeva6516]

2017 Audi q7 latest vechile this fault code stored

[@mihaipopa5784]

Where are you based?

[@Ecutestinglimited]

We are based in Derbyshire but offer a world-wide service