I have on my hands a JDM B18C OBD2 ECU with the pigtail plugs. I looked to find a secondary o2 sensor wire on the A connector but found it missing. Is it that OBD2 in japanese cars have only 1 o2 sensor? Before telling me that it's OBD1 I found the revision number on a website and it stated that it was JDM OBD2. I'm trying to install this OBD2 JDM motor in my OBD2 GSR but with no 2nd o2 sensor I dunno what to do. I'm thinking of just getting a USDM OBD2 ECU.. what you guys think