i have a 04 wrx with an up-pipe , down-pipe and catback, and i have a cell fix for the o2 sensor and a exhaust leak, haha. i was driving normal and then the check engine light just turned on the only thing i can think of is maybe the o2 went bad maybe? can anyone help me out

 

fix the exhaust leak and check your connections to the cel fix alot of times the wires break off the resistor.
have you gotten a reflash yet??

 

not yet

 

If it’s not the cel fix have the code pulled then click on this https://www.i-club.com/forums/engine-power-ej20t-pre-2006-wrx-jdm-60/complete-list-all-subaru-obd2-error-codes-44311/.

Do you have the oe egt probe installed in your aftermarket uppipe? If not you will need a cel fix for that also.

 

pull the code...meet up w/ someone who has an access port or a code puller thingie and the code will tell you what you need to fix post up the code if in doubt...