do you need o2 sensor

[b20teggyjdm]

do you need your o2 sensor on 94 integraif you dont have it what will happin and whats the differencewhat about if you get your computer reflashed not to have one

[D3UC3S]

only reason you need it is if you have to get emissions...no difference other than maybe a few MPGs(like 2 or 3) if you have your ecu chipped.

[scttydb411]

if your car is tuned properly you won't need it unless you need to pass emissions.

[preferredduck]

Emissions device unless u r chipped and tuned at least you dont have to have 2 like my car, but there are cheaper ways to get the light off you you don't have smog check that are safe. my car is done that way and no emissions here. is yours bad, are you going a swap, what, sorry to ask just curious.