I have searched on here and have yet to find a direct answer so hopefully i don't get blasted for asking. I have the tick tick tick in my 2000 LC. Started a couple months ago. The question I have is, do I need to replace it. I understand the 02 censor may eventually fail, but other than that, can it do any real damage to the vehicle? My mechanic (who would get the job) said he wouldn't bother. He said the leak is minor. I use this vehicle only for hunting and it is not my daily driver. We do not have emissions where I live so that would affect it. Any insight is appreciated.