k here is what i know. I'm throwing 2 codes, one for primary o2 sensor and one for secondary o2 sensor. I'm running an Si p2t ecu. I have no clue which wireharness. THe car is a 00 Civic hatch. I believe dx but dont know. the car is swapped with a gsr motor. i have found the plug for the first o2 sensor but have no clue where the second o2 sensor plug is. i have looked everywhere in the engine bay and under the dash and behind the cup holders. Help me, i need to pass emmissions.

 

isn't there one before and after the cat? I don't know for sure just think i've read it somewhere here.

 

there were no o2 sensors on the car when i bought it. when i look under the car and in the engine bay i just find 1 o2 sensor.

 

is the gsr obd1 or obd2?

 

good question, i'mnot sure. i'm assuming obd2 because its using an obd2 ecu but i have no clue. what if its obd1?

 

hey i have a spare o2 sensor simulator sitting around that might help you out.....im or email me if you want