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  1. #1
    Reverse Gear

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    ABS warning light at 70+mph????

    Hi guys I'm hoping for some advice on this problem with my A4 avant 1.9 tdi 1998 basically I have changed the rear discs, wheel bearings and pads now as soon as I hit 70 on the motorway the ABS light comes on and stays on till I turn the car off? Below 70 it's fine have checked for play in the wheels/ discs but have none?

    Thanks in advance
    Xander

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  3. #2
    2nd Gear

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    I have this exact same problem on my A3 8l. Very annoying.

  4. #3
    3rd Gear

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    You've either knocked the abs sensor a gnats danglies ween doing the bearing, or have a damaged reluctor. I'm sure I have a cracked reluctor, and I get this after about an hour at 70. I also have the low speed pulsing issue.
    It's the constant vibration that changes the gap and trigers the fault.
    The good news is that VCDS will tell you which wheel is the problem if you had the light on at any point.
    1999 A4 B5 1.9 TDi FWD Saloon, Green SOLD
    2000 A4 B5 2.5 TDi Quattro Avant, Maroon, 'Panzer' Plated (currently sporting wrecked engine - and gearbox )
    2000 A4 B5 2.5 TDi Quattro Saloon, Blue, 'Panzer' Plated, Cruise Control retrofitted, OEM 6 Disc Changer retrofitted
    2006 A6 Allroad 3.0 TDi Blue, awaiting stuff to be done!

  5. #4
    Reverse Gear

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    Ok have checked the sensors had a tiny bit of movement just need to take it for a run to see. Now this will sound stupid but what is VCDS??

  6. #5
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    Ok abs light sorted had a quick blast up the motorway and no warning light😜must have knocked it when I was fighting with a wheel bearing that had completely des integrated cheers for the advice guys

  7. #6
    S4_dan's Avatar
    Fire up the Quattro!

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    Always good to hear when faults are so simply rectified.

    VCDS is vag-com diagnostic software for reading the ECU and pulling the DTC codes up. Also, with a fully registered version you can also program some changes to the car. But nothing like remapping the ECU, Thats different. You can change things like BOSe/NON-BOSe on the stereo, change auto sport boxes into permanent sports mode and lots of other things.

    Have a read from here: Ross-Tech Wiki

    Dan
    2002 2.5 V6 Quattro
    Mods Done: Q5 Rear aero wiper. Front ambient light install. Led number plate lens. Towbar with 13pin electrics.
    Mods to complete: Sport shocks to go with Eibach pro springs. Fit 17" 5 star matt black wheels. Fix lack of torque at low revs. Get a custom exhaust system fitted.

    FOR SALE - Eibach Pro Sport springs for a 2.5 V6 B6/7 PM ME.

  8. #7
    Reverse Gear

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    Thanks Dan I'll have a look now all I need to do it get another rim as a pothole dented the outside lip and no companies near me will repair it so it a new one gggggrrrrrr!!!!!

 

 

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