[chaseramsey]

My check engine light came on in my car it was both of my o2sensors so I replaced the downstream one so just the upstream one is bad and needs to be replaced to pass inspection and turn off my light is there any way I can just take it out and clean it? What is the best way to clean it?

[odinn7]

No, you cannot clean an O2 sensor. When they are bad, that's it. There is an element inside the sensor that goes bad from age or contamination.

[TxGreaseMonkey]

Impossible.