Please help.. I'm throwing engine code P0135 Primary Heated 02 Sensor circuit fault , P0113 Intake Air Temp. sensor circuit High, and P1337 Crankshaft Fluctuation Sensor no signal. Here is what I have.. 1998 Civic "HX" stock wiring harness.. the only model that has the 7 wire o2 sensor Engine B18B1 I believe is a 94-97 model.. doesn't have the sensor on the crank. ECU 37820-P75-AO3 which I belive is a late 97 or possibly early 98 computer? I tried to wire a 4 wire Bosch replacement 02 sensor but I've failed. What do I need to do in order to kill this engine code? Purchase a "EX" wiring harness? If I remember correctly the 02 sensor is tied together some how with the IAT fault code that I'm throwing. I'm hoping once I fix the o2 it will cancel the IAT. Do I need to buy a 1996 model ECU to cancel out the P1337 code? With the engine throwing these codes, the local dyno ran it and I have 230whp 200lb of torque. But I need to sort these codes before I can go any further.. any thoughts would be appreciated.