I just swapped a 96 H22A into my 97 Accord. I used a conversion harness. My ECU is a OBDI P13. I am getting a check engine light for my 2nd O2 sensor. I am also getting a CEL for my EGR valve left sensor. I checked both O2 sensor and the first one works and the second one doesn't. I checked the EGR valve sensor and it reads the 5 volts that it is supposed to?? What's going on? Why is my 2nd O2 sensor being read when it should only be reading the 1st sensor?

 

if you are using an OBD-1 ecu, then you aren't getting a CEL for 2nd O2 sensor, because OBD-1 engines don't have them! Reference your check engine lights to an OBD-1 book, not for your 97 accord. Also, so you are using a jumper harness, which one?