ABS / traction control

Cerbrus2

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So I have an issue with the abs and tc lights comin on, on the dash. If I plug in a code reader it reads no faults at all. But this could be because it's just a amazon jobby. And wont read the car, although it worked fine on my other halves focus, but not sure if a 08 focus uses a canbus or not.

However. The lights only seem to come on when the car is stationary at a set of traffic lights etc. And turns off if I quickly switch the car on and off again. Sometimes the lights dont come on at all. And sometimes they come on everytime I stop.
I recently changed my brake pads, so wile I was doing them I took the sensors out and gave them a clean with warm water, but the problem is still the same.

Any body else had a similar issue.
 
Check the connectors for water ingress, could be shorting intermittently.
 
Weak magnets on one or more sensors. Best off having an Audi specialist look at it for you. I had an intermittent fault on one of the rear sensors, cost £90 all in. Also Obd2 code readers don't pick up abs faults.
Hope this helps.

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