Hey all,

I believe the trouble code I had read from my GP says there is an O2 sensor issue. I believe there are 4 of them. 3 upstream before the Cat and 1 after the Cat downstream. Is there any way to know which one(s) is(are) bad? I would hate to have to spend the money to get them all changed if it is only one causing an issue.

Any help is greatly appreciated!

Thanks!

Tim