hey guys so I have a 2012 Subaru wrx and I recently had my clutch swapped out, sparked plugs changed, coolant flushed , etc. I assume these guys pulled the engine. now when I got the car back it threw a code of p0031. I checked the fuse and it was blown so I put in a new one, now im pretty sure that means that I need a new front o2 sensor any thoughts. any recommendations on where to get it and part numbers?