I had my right rear wheel speed sensor pack up in January so I replaced it with a sensor from Euro Car Parts. All was ok till about a month ago when the sensor stopped being able to read speeds under 5kph and decided to engage my ABS pump when I was crawling along!
Anyway 4rings came and diagnosed the issue and suggested that I bought a genuine Audi sensor to replace the euro parts one. I replaced the sensor this weekend and got about 10 metres down the road before my ESP and ABS lights were flashing at me! I plugged in my trusty VAGCOM and logged the sensors activity. As you can see from the log below the sensor doesn't pickup any signal till about 43kph then it goes nuts and starts reading random speeds!!!
I spoke to Audi about warrenty on the sensor if I can prove it is faulty by swapping it over with my working left rear wheel speed sensor. I was told that their mechanic will have to diagnose if I want the part replaced as I had fitted it myself. $$$.
I am planning to swap over the left and right sensors this coming weekend to see if the problem follows the sensor. If it doesn't then I'll be heading to the stealers for a wallet beating.
Does anyone have any experience with these sensor problems? Could I have a faulty part or is it more likely to be the rest of the wireing?
Here's the log: