ok so here is my problem i have a 98 integra gsr obd2. a check engine light is on,but this only happened after i pput a high flow cat on but anyways the light is on and i scanned the car and it says o2 senser bank 1 leaning out now i have no idea on what that means can some one help me cuz i am in a jam

 

Did you plug in the O2 sensor?

 

did you actually read up on this? or did you think see "hi flow cat: more hp" and bolt one on...

the way i see it, high flow cats arnt that much different than test pipes, your still not gonna pass emissions.

your code will say o2 sensor bank 1 sensor 2, bank 1 would mean in a v6 or v8, youve got 2 banks. since you have an inline 4, youve only got the 1 bank. sensor 1 is the one before the cat, sensor 2 is the one after the cat. since your cat is basically not doing anything, your sensor 2 is gonna see it as the cat not functioning, and throw a code.

just replace it with the stock cat when its emissions time, clear the code and youll be set.

what do you mean by need help asap anyway? are you due for emissions? or do you just want your light off?