EPB Faults - final shot in the dark!

[Duffy]

Hello

I've had regular fault codes coming up for my S8, namely

02596 - Rear Brake Pads Worn
008 - Implausible Signal

and

02438 - Right Parking Brake Motor Hall Sensor
008 - Implausible Signal - MIL ON

which I can't clear.

I've just done discs and pads, done the full VCDS adaptation process for the pads and the function test several times, all of which has made no difference, the brake works perfectly, voltages across both calipers are good.

I've checked both connectors, both were immaculate inside, I've continuity checked between the control unit and the caliper, again all good.

Any suggestions/thoughts before I invest in a new caliper? It's only done 49K and looks nearly new........

Sir Wil, can I have my D2 back?????????

[Delboy]

I seem to remember reading something about the ignition having to be turned off at some point in the pad change sequence, was that done?

[Duffy]

The procedure was followed to the letter..............made no difference and seemed to go perfectly, it just didn't clear the errors.

[PsYcHe]

The hall sensor on the motor being out would possibly lead to the motor not being exactly sure where it is and as a result, not sure if the pad is as thick as is claimed.

[Duffy]

I suspect you're right.

I've just repeated the whole process and checked that the pad thickness adaptation had taken (it had) and just checked the brake switch function as there are a couple of yank threads re this causing issues, it's working fine.

New caliper time.

My calipers are painted black, that'll equal a couple of hundred extra pounds from Audi!

Are all S8 rear calipers the same?

[Delboy]

Could you not replace just the motor?

[Norretal]

Originally Posted by Duffy

I suspect you're right.

I've just repeated the whole process and checked that the pad thickness adaptation had taken (it had) and just checked the brake switch function as there are a couple of yank threads re this causing issues, it's working fine.

New caliper time.

My calipers are painted black, that'll equal a couple of hundred extra pounds from Audi!

Are all S8 rear calipers the same?

Howdy Duffy, you may say that in jest but that's exactly what Audi do, charge you twice the price for an S8 one because they paint it black! I checked with A8 Parts when I had to replace one of mine and they confirmed they're the same so I bought an A8 one for £300 instead of paying £600 for an S8 one. I'm quite capable of painting it with some black paint when I get the chance to do so

So if you do end up buying one don't let them tell you otherwise, the A8 calliper will fit your S8