Reader U480?

I have errors with my fiesta as it performance not the best at the moment.

I attached reader u480 and it came up with codes p0130 and p0134.

I have done no work on the car and done a further reading 2 weeks later to get p0304.

My problem now is that the reader now says there is no codes indicating there is nothin wrong which i defo not the case is there anyway of getting the codes back or do you know why it wont read anything now (unless its broke story of my life ha).

Trying to have a 'cheaper' alternative car has backfired on me think i will stick with my Minis/BMWs from now on, Ford aint my friend