Here is my current dilema. I have a 1998 Honda Civic Hatchback with a B20B swap I got a CEL and its throwing a code for an upstream O2 Sensor malfunction the O2 sensor is brand new so I dont understand why it would be throwing a code. I let the car run for a bit drove it around thinking would open the sensor up and that didnt work I also unplugged the battery for five minutes that also didnt work. I checked the voltage on the wires and its getting power from the ground and everywhere else. The O2 sensor is for a 96-98 Integra im thinking that maybe I have the wrong one? A few of my buddies said that I could have the wrong ecu as well which is an OBD2LSa. Do you guys have any ideas or any other suggestions I can go about solving this issue? Any help would be greatly appreciated.

Thanks in advance guys.

 

no one can help me out?

 

I have the same issue with my 95 hatch b20b swap. What ecu are you using? I have a obd1 pr4 ecu and that requires a 4 wire o2 sensor, I found a guide on how to wire it somewhere on here but it still doesn't work, so I'm curious about this as well.

 

I have an OBD2LSa ecu and its also a 4 wire to the O2 sensors......This is keeping me from getting my emissions which means I cant drive my car

 

I was supposed to get mine inspected back in February but I'd fail with the CEL on

 

yea bro it sucks *****! My car has been sitting in the driveway since March

 

Well what ecu are you using? That'll tell you what o2 sensor it runs off of, I.E. what o2 sensor you'll need to install

 

obd2lsa...is their anyone out there that can help a brother out!?!?1

 

figured it out....