i put in a test pipe with an O2 sim on my 98 ej8 and since then im still getting a CEl so i jumped it today and it reads #63 which is secondary oxygen sensor circuit, anyone have any idea what it could be??

 

you are gonna have to go and get it read properly because there are many different secondary o2 sensor circuit codes.

"o2 sensor circuit" malfunction
" " low voltage
high voltage
slow response
no activity detected
heater circuit malfunction


all of which require different repairs