02 Tacoma smells like rotten eggs

I bought this truck a couple months ago. only has 60K miles, driven by an older fellow since new. Great shape. Yesterday it started to smell like rotten eggs. I read up a bit on it and the internet says everything from bad fuel to head gasket to bad cat to bad 02 sensor? Anyone have this problem??? please email if possible.

Thanks, Jonathan

bobcat010@gmail.com

 

Most likely the rear oxygen sensor but I would give it a few tanks of gas before replacing it. They are about $50 I think.

 

A friend of mine had a Toyota truck (1980s), and he had the same problem, but it was the battery that smelled, it was something about the way it was charging making it smell like that. Something with the alternator... I think....

 

My old car had same problem, it was o2 sensor

 

the rotten egg smell you speak of is indicitive of a burning CAT ,IIRC

 

I second this, I would look into the Catalytic converter, are you getting any codes?