First Nigel thx.

I'm new here to write a question i have only reading here the forum for a view years and learn a lot of u all txh here 4.
I have buy a seccondhand A4 and this machin have a ERR:
i have try this problem to remove but it will not work.
If i do the compleet test than is in F2 a error
F2 KetA02 86AC504E 88F51D49 how can i fix this problem
( sorry fore my bad englich )
Plz help me thx a lott Fred.