I have a 98 Contour with 61,000 miles on it. Two days ago shortly after putting gas in, the CE light went on and has not gone off since. Unwittingly, but to my advantage, I went to have my emissions tested today and although I failed the first test I passed the second. In the process they checked my codes (yeah!) and they are as follows: P0171 (System Too Lean - Bank 1) and P0174 (System Too Lean - Bank 2). So... what do you think?? Please advise and thanks in advance. You guys are so much help!!! This is a great board!!