[Steve Jones]

I've been having the 41 and 46 codes the last couple of weeks on my 99 Corolla. Luckily, I have my own code reader that clears codes. I clear them, they come back within a couple of days. I checked the gas cap of course, as that is what many searches on this show up. This was the first place where I found any estimates on cost. I have just over 200k miles on my Corolla, the only major problem prior to this was I had to replace the starter, pretty easy once I figured out exactly where all of the bolts were. Anyway, has anyone on here done this fix before? I've read on some other sites that there could be a number of components causing these codes. Just looking to see if anyone has done this and how hard it was. I have no doubt that I could do it, but finding the time to do it is the trick.