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Facelift Tyre pressure loss indicator fault?

Darroch Jul 12, 2018

  1. Darroch

    Darroch Active Member

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    Is anyone’s tyre pressure loss indicator unreliable? I’ve had it at the dealer to check for a fault but they’ve said all tyres are fine and it will be due to uneven tread between the tyres as one of them was replaced. Wondering if I should take it back to get the part replaced as it’s coming on at least a couple of times each month.
     
    Snake Pliskin likes this.
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  3. Chris43

    Chris43 Well-Known Member Team Nano Grey Audi A3 S-line owners group

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    TPMS works by comparing the rotation speed of each wheel on the same axle, a sudden loss of pressure causes the diameter of the tyre to change and therefore the rotational speed. I believe it utilises the same sensor as the ABS system. It could be the ABS sensor on a particular wheel that's playing up.

    Have you tried rotating tyres on the car, if the TPMS warning keeps occurring then it could be the tread depth and overall tyre diameter. A good friend of mine is an experienced tyre fitter, apparently vastly different tread depths / tyre diameters play havoc with the control system on 4wd cars so there could be some fact in Audi's claim.
     
    Snake Pliskin likes this.
  4. Snake Pliskin

    Snake Pliskin Well-Known Member Supporter Team Floret Silver Audi RS3

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    Funnily enough ... wife has just called me to say her TT has just flashed up loss of tyre pressure.
    She has visually checked and all 4 tyres look fine.
    My initial reaction was that it could be a nail / slow puncture.
    But seeing this thread, it could be a faulty sensore.
    Will inspect the car tonight, takes readings of the tyre pressures to see if I can see which tyre ... or does the computer tell you which tyre ?
    If I can't see anything then could be the sensor.
    Can you reset this or is it a Dealer job ?
     
  5. cuke2u

    cuke2u Well-Known Member TFSI Owners Group saloon Audi A4 S-line owners group

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    If the abs sensors are at fault there should be a fault code..
     
  6. Snake Pliskin

    Snake Pliskin Well-Known Member Supporter Team Floret Silver Audi RS3

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    Checked all 4 tyres.

    Visually all fine.
    Pressures all fine.

    Reset pressure sensors in mmi ... all good so far :icon thumright: ?!?!?
     
  7. Khufu

    Khufu Well-Known Member

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    we have found that you need to replace all 4 tyres at the same time on a BMW X1 or it brings the ABS lights on so it could be the tread depth.
     

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