ABS Traction control warning lights

[JASEA4]

Hi
ive just recently purchased an audi A4 Avant 2001 tdi

i am experiancing an issue with the abs / traction control lights coming on only when on the motorway at around 70 above,
around town no issue

ive had the rac look at it and hook up there computer and the fault showing was nsr speed sensor

ive bought a new one fitted it cleaned all the brakes up as well , had fault removed from the car , light still coming on , starting to bang my head against the wall and feel as though i cant enjoy my new motor and first audi

has anyone experianced the same issue

or is there any one on here in the telford shropshire area with a vag com that would be willing to assist me sort this issue out , i know its cheeky with such a low post count

[Quattros]

have you checked the reluctor pickup ring? the castle shaped ring the sensor sits close up against. make sure its not cracked or loose as rust can get under it and cause it to crack or become loose..
also worth checking connection to sensor as dirt can ingress and cause corrosion in the plug.

[JASEA4]

hi mate thanks for the reply , re the plug the wire connetor goes in the car and under the seat and whole new sensor placed on the car , re the pick up ring , it looks ok couldnt see any damage to it however was heavly corroded , iv cleaned nearly all the rust off it , but still to no avail , unless the corrosion has caused any damage , all teeth are present and look ok , but might look at changing it if all else fails , can these be bought as after parts or does it have to be oem,

do they come off and on ok or do they need heating up???

[JASEA4]

done a vcds lite scan on the car today it comes up with the following can any one shed any lite on it for me

abs/asr/5.3 front DOO
soft code 00012
wsc 06435

[JASEA4]

right well ive had an audi tech working on the car today, and the vac computer plugged into it , we have managed to remove the fault on the n/s/rear speed sensor, great news , how ever on test drive the lights are still comming on at speed the computer is throwing up now the os/ rear speed sensor static fault, we replaced the sensor removed the code , test drove , lights on , reset the air gap removed fault test drove lights back on
got new discs pads and reluptor rings for it to eliminate all of these , will not be able to fit till thursday so fingers crossed for then,
on the test all four sensors are funtioning correctly and identical speed, done computer check on the abs pump and operates correctly on all four wheels
if the new abs rings dont correct the fault we are all baffled

[VAGMAN54]

you need to make sure the signal is reaching the ecu the only way to do that is with an oscilloscope changing all them parts is not neeede and expensive audi should know better than that .........it may well be a broken wire or a corroded pin at the ecu........................a 2001 plate will be a impulse sensor signal and that has got to be seen at the ecu otherwise the light will stay on.....................

[JASEA4]

cheers for the reply mate , the light only comes on when travelling at over 75 mph, i can drive around all day > 70 mph and nothing appears ,

turn off the ignition and light goes out

but like i said the initial fault was on the ns rear we have completly sorted that one out ( intamitant fault on scan) now its activating and stating osr static ????? this wasnt there before

[JASEA4]

Well its the first time ive had chance to test drive the audi since replacing:

both rear abs speed sensors
both rear abs ring
both rear discs and pads
both rear pistons

cruised down the motorway at 80 mph and no lights coming on
had four new tyres and tracking done on front
and gave it a winter service
hopefully i can now start to enjoy the audi