What Up Guys..well i took my 94 accord ex (4door) to my local inspection station, and i failed The Emissions...they told me that i failed because i have no Oxygen sensor...i have a ciouple questions...

1.How much would it cost for one?
2.where the hell is the oxygen sensor located?
3.Does the oxygen sensor have nything to do with the Fuel gauge..because my fuel gauge needle always stays at teh same spot.

Thanks for ur help..i aprreciate it