P0431 Audi -

Question

I am getting codes, in this order 0431,0421,0491,0492. My audi A6 Quatro 2.7L initially started but when driven it put puted along then seemed to run normally for a short time returned to the put put mode and now will not start at all. Any suggestions to get this started so I can move it from a private parking lot to my residence, etc.