Hello all. I'm new to this and this will b my first post. Thx for having me. Ok so I'm having issues running rich. Codes p0175 and p0172. Initially I only had the 175 code but Audi told me one of my o2 sensors was dead so now I'm getting both banks rich. I've had this issue for a long time now and I'm starting to get frustrated. I need help pls. Any suggestions would b greatly appreciated. Things I've done so far:
- vacuum test done, no leaks
- replaced fuel filter
-replaced maf and adaptation
-replaced coolant temp sensor
-replaced pcv valve
-replaced coolant tank reservoir(was cracked, possibly N/A)
-replaced 3 of 4 o2 sensors ( pre cat bank 1 not replaced)
-gutted my pre cats since diagnosis turned up pre cats were getting blocked
-installed defoulers I main cats
I've replaced alot more stuff just can't think of it right now. I even tried sea foam. Doubt that helped. I've replaced the plugs but had to take em back out and ended up putting my old ones back in which still looked good. Reason why is I bought the Bosch ones from Audi and the car did not like them. I'll b buying a new set of NGK plugs soon. I should add Im having an extended cold start and rough cold idle. My next step is replacing plugs, oils and filter(Audi told me excessive smell of fuel in crankcase thus pcv was replaced) and changing fuel pressure regulator. I have one question. The o2 sensors didn't have adaptation done. Does the ecu do it on its own or do I need to get this done? Any suggestions? Thx in advance
Sent from my HUAWEI MT7-TL10 using Tapatalk
Reply With Quote
Bookmarks