Robwest100
17-01-2019, 03:15 PM
Can anyone help with this issue on a 2009 Audi S5. I have fault codes for P0101, P0171 (lean bank 1) and P0174 (lean bank 2) which keep coming back after each attempted fix. Mass Air sensor has been replaced, smoke tested for air leaks, None. All sensors seem to be OK when scanned at a specialist garage and today I had a full walnut carbon clean of the inlet manifold and valves. Car holds back when cold and codes come on within 30 miles of resetting. Any ideas welcomed before I chuck another pile of cash at it.
Rob
Rob