CEL code 45 on 92 Prelude S Left (front) air/fuel ratio out of range-rich or lean

[pitbull325]

Please help, I have a 92 Prelude S, modified it as soon as I got it (intake, high flow muffler and aftermarket header, it already had a high flow cat), and now the CEL is on. It shows a code 45 Left (front) air/fuel ratio out of range-rich or lean. I don't want to run it lean b/c that can cause engine damage, and I don't think it's running rich cuz it's not smoking black or sooty. It seems to run ok, but it idles low sometimes (not up and down). If it's running lean I was thinking 'bout putting in a resistor for the IAT sensor to run it richer. Any help will be greatly appreciated!

[scttydb411]

best thing to do is to get a wideband on it to see what it's doing rich or lean then fix the issue if it's a bad o2 or whatever it could be. putting resistors on the iat isn't the best way to fix it.

[green91]

Id try resetting the ECU first.

[pitbull325]

You are the man! Of course it was the o2 sensor, what was I thinking? I owe you one.