I have a Honda Accord 98. Recently I have got the Check Engine Light
on. I read the Haynes manual and tried to get the error code from the
PCM which turned out to be "80" (using the blinking light method in the
dashboard). I interpreted the code (from the Haynes Manual) as a leak
near the fuel Canister. I thought that the problem occured with not
tightening the fuel cap, so went ahead and tightened it real good.
After a couple of days, the light went off. Again after a couple of
more days (with me not touching the fuel cap), the light came back on
again. So now the problem is it comes and goes from time to time with
the same error code. Any ideas on what could be the issue ? Do you
think that I have a faulty fuel gas Cap ? Or am I interpreting the
error code totally wrong ?

PS: It is Winter here and the temperature are around 50 deg
farenheit...

Regards,
John Edwards
Virginia, US.