What is the cost of a throttle body that keeps sticking open? on 2006 Audi A6 Quattro

My engine light is on.

Asked by for the 2006 Audi A6 Quattro
scan test for codes ,if the throttle body is sticking I would spray some lube on it and try to free it up but once you find the code it should give you a better idea as to what to look for