Abs question

[mickywat55]

What would usually be wrong if my abs is kicking in at low speeds when it should'nt be?

 

[Legojon]

Faulty wheel speed sensor? The ecu would think a wheel is locking when it's not.

 

[andycupra]

sensor, or likely the wire going to it. (particularly the connection between wire /sensor) this can often be 'fixed'.

 

[mickywat55]

I'm not that mechanically minded but is the wheel speed sensor hard to find?

 

[Woody_72]

No, it's very easy to spot and change. If you jack a corner up and take the wheel off you'll see a cable going into a smallish module on the back of the knuckle. Pretty obvious when you're looking at it. Just don't mistake it for a brake pad wear sensor (although there'll only be one of these on one side of the car). This is the wheel speed sensor on the back of a rear knuckle on my car:

 

[RUM4MO]

Instead of scattering good money on guessing what is wrong, you would be better finding someone local to you that has VCDS or Carista, if you can't do that then find an independent VW Group specialist workshop, failing that any SEAT/VW/Skoda/Audi workshop to run diagnostics on that car.

Or you could buy Carista and check what faults are getting logged, don't buy a cheap OBD2 scan tool as it will only check engine emissions codes.

 

[Woody_72]

That's a good point but a simple start to the investigation could be to look behind each wheel and make sure all the sensors are in one piece and plugged in properly with no obviously damaged wiring etc.

 

[RUM4MO]

One problem can be, one person's "wiggle" test is another person's "wrecking/breaking" test, so maybe more money wasted if "look - see" is not carried out sensible and with appreciation of how fragile these cables can be on a car of this age.