Should this be there just sitting under the dash ?

 

Is that an O2 sensor? Let me guess, 96-01, OBDII.

 

yes 1998 integra gsr. Should that be there ? is there a place for it ? or just seatting there will be aight ?

 

Evidenly, someone's installed an aftermarket cat and it doesn't have the second O2 bung.. or maybe a wideband O2 and left the old one there. Anyway, there's a hole in the floor near there where the wires are supposed to go through to the back of the OEM cat.

So if you have a stock ECU, you're getting a code (MIL).. right?