Re: 91 Civic with Code 1 problem
Hey cool. My 91 has a clip that keeps the wire far from the fan. Make sure you do not have a vandal for a neighbor, too. Cutting the O2 sensor wire and so messing over the Honda owner would be pretty darn easy. I think a person could even crawl under most Hondas c. 1990, reach up, and cut this wire, all in about two minutes.
Your post is particularly helpful for the archives, since most c. 1990 Civic enthusiasts know that a failing O2 sensor (as in old) will not necessarily throw a code but will exhibit poor performance (like lowered MPG). If one does get an O2 sensor code on an 88-91 Civic, like you did, chances are a wire has broken completely. I think this is the first time I have ever read of someone having the O2 sensor code on an 88-91. OTOH, many have benefitted from replacing their O2 sensor even when no code was thrown.