I just got a 03 04 and an 05 03. The first one is the knock sensor the other is the 02 sensor. I went into a car wash and they just popped up. I just got a y-pipe a few weeks ago so that's why the sensor might be coming up, why is the KS popping out though. Also just changed fuel filter yesterday. Is my only choice new sensors? If so where can I get them???

 

Just reset the ECU and the codes went away. They'll probably be back so anyone, where to get cheap SENSORS???