Im keeping the o2 sensors i just need to know can the car be tuned without one of them in place? so as long as limp mode doesnt set in i can just stick a wideband in place of the stock sensor and tune from thereteamxrsx said:you have to keep both o2 sensors....the ecu will not accept only 1(unless you have a o2 sim, which was made for the o2 sensor that the ECU measures catalyst effiency from, the second O2, in the cat). The first sensor is the only sensor that actually tells the ECU what the A/F mixture is, the second one checks to see if the cat is working by reading the A/F to make sure the cat is actually burning up the unused fuel. Which is the cats only purpose. Like i have said before......having the P0420 DTC when runing w/out the cat will cause no harm to the motor and does not effect a/f ratio calculations from the first o2 sensor. Nor does it affect ECU operations, other than normal emissions monitering(which is why the ECU throws the CEL).
I think you are worring too much about the testpipe issue. Just get a OBD II scan tool and be done with it.
teamxrsx said:according to Hondata, your stock O2S is a wideband sensor. It reads 10.5:1-30:1 A/F ratios. Why take any O2 sensor out other than to replace it with another better sensor maybe...but for that reason only. you cannot eliminate any of the O2 sensors at all unless you get a sim.
I'm just tryin' to keep you from wasting your money, you can do as you wish.
You can tune for anything as long as the O2 sensor is in good shape and in place.