Rep Power: 0

hey all. im new to this whole car thing but im learnin quickly. But, my first car (which is a work in progress, just put an intake on it) is a 99 civic Lx sedan. check engine light is on cuz of a bad 02 sensor. is there anyway to tell which of the 4 sensors is out without taking it to a shop to run a diagnostics? like whether its the exhaust sensors or the catalyst?, or upstream or downstream? Thanx

 
Rep Power: 258

the code shouldve told you which one it was. a problem we see a lot at our shop is after you replace one, they all start to go bad within a few months.