My check engine light came on so I went to carquest and had my code read.

Came back my o2 sensors were bad.

I have stock exhaust, stock cats, nismo headers.

What to do???

 

Clean them? And if that doesn't help, replace them.

 

^ Well said my man, well said.

Depending on how old/how many miles ur car is/has OP, I'd just replace the sensor....it isn't that expensive.

 

just wipe them off?

is there a way i can tell what is exactly wrong when i take them out ?

 

No.. don't touch them with your fingers. Use o2 sensor cleaner and follow the instructions. But it would probably be beneficial to just replace them if they have tons of miles on them, because cleaning them would be a temporary fix.