I just failed a smog test today. Theres 3 fails. RESULT ECS FAIL- MIL HC (PPM) 15MPH MAX: 60 AVE: 9 MEAS: 72 THIS VEHICLE FAILED THE MIL/CHECK ENGINE LIGHT DUE TO OBD COMMUNICATION FAILURE. I just bought the car and was told it passed smog. I can see that it wasn't too bad of a fail. The swap passed BAR w/sticker and the smog tech's visual. The ECU is a P75 which I think is from an LS with a jumper harness. I think this link is what the harness looks like https://www.jhpusa.com/store/pc/viewPrd.asp?idcategory=122&idproduct=2040 But heres a picture of the actual harness and ECU. The ECU is probably converted for VTEC. It hits VTEC I only drove about 2 miles to the smog station from the first start up of the day. Could this be the reason behind the HC (PPM)? I plan to buy a GSR OBD2 ECU tomorrow to replace the LS ECU. Will I be able to hook up a the GSR ECU to my original pins without the harness? Can the the failure to communicate with the OBD by caused by the LS ECU being converted/OBD1?