swedepat

Hello.
I have spent about 6hrs searching to get some answers, but itīs hard.
First things first.

About two weeks ago the car said to me esp was unaviable(still driveable).
that time the code just disappeared with a restart of the car.

this weekend all hell breaks loose *lol*

My stepson stopped at a redlight and when green wanted to just accelerate up to legal speed.
But no,, ABS system is holding his speed to about 5mph, no more.
well, i tried the the car, and yes! itīs a fact.
Setting car in 'dynomode' lets me drive it normally.

Wenīt to a friend and used his OBD scanning tool.
Got three codes(iīll try to write them in english)

1425: ESP Wheel speed implausable
1373: None or faulty CAN message from tractioncontrolunit
1789: Error stored in components controlunit.

Iīm guessing itīs an ABS sensor that has gone bad.
But it still leaves me with no clue at all.
Wich one?

Searching the web gives nothing, it just leaves me clues that it might be short to ground in circiut and at right rear position.
But,,, thatīs on an Audi...

Please help!

Rgds
Patrick
Sweden