My car has been throwing a P0155 code pretty much since I got it. I have had the offending sensor replaced twice and the light has always come back on within a 100 miles.
At some point I was told that as long as my gas mileage stays OK that I don't really need to address it. A couple of months back I finally cleaned my intake filter and ever since (not sure if this is related or just a coincidence) my mileage has been dropping. It is now ~18mpg which is really bad.
I went to Autozone yesterday and it now shows P1151 as well.
Any thoughts as to what might be the underlying problem or should I just get the 2 sensors fixed and reset the computer?
