A6 Quattro 2.4 petrol engine light.

Hello everyone I am new to the forum and new to the Audi Marque.

I have been lucky enough to have been given the above 2001 V6 estate with only 78,000 miles covered.

The engine management light is on and the previous owner told me it was a faulty cam phase sensor. Could someone please tell me what sort of job it is to replace and any other things I should do whilst at it?

There is also a blowing exhaust somewhere just after down pipe. Apart from that it seems a nice car.