I am getting three CEL codes - 1, 45 & 65 - the setup is a B18C5 in a '99 DX. The O2 sensors were just replaced. I have tried clearing the codes but haven't had any luck. I think it is a wiring issue. Are there any information pages online that might yield specific information about properly wiring the O2 into the system? All of the information I have seen doesn't solve the issue. #1 - Oxygen Sensor "A" (Primary) defective circuit or unplugged / defective sensor #45 - System Too Lean or Too Rich malfunction in the fuel monitoring systems #65 - Oxygen Sensor Heater (Secondary) malfunctioning or defective oxygen sensor heater Thanks for your help.