i checked the code on the ECU myself and got 0901... which is "o2 sensor front fr".. this came on when i put on the K&N filter and adaptor. no.. i know there is a mass air sensor.. is this o2 sensor the little sensor that was screwed into the factory airbox that i had to leave wire-tied up in the engine compartment b/c i dont have the factory airbox anymore? any help would be great.

 

The wire that is next to the Mass Air sensor is your temperature sensor which should be located somewhere in
the intakes air flow. In the picture below I had mine in the rubber neck of the K&N filter.

<IMG SRC=http://integra.vtec.net/geeser/megamax/images/mm_intake_1.jpg>

The front O2 sensors are located in the Y-pipe, it directly under the motor. You would need a 7/8 combo wrench to remove the sensor, I'm not sure which one would be bad. If you need
further info on how to remove them just e-mail me.

Otherwise the dealer will be able to take car of the sensors.