I have a Civic 2000 si, just got a b18 swap, I think one of the IAB wires came loose and grounded. I think that is what is causing my code 20 on the ECU. Is this what caused it and what are my options, do I really have to replace this unit, if I do can I grab one off another honda? What are my options? My Speedometer is not working, vtech aint kicking in. PLEASE HELP!