I am suppose to go to the track this morning, and I woke up this morning and my CEL was on, typical. I brought it to autozone to get the codes (since I am lazy and it is free). The knock sensor OR the O2 sensor is bad according to the guy, hopefully. The car does not feel slower, and my idle is a little inconsistant, so I think it is the O2 sensor. I see they have them at courtesy. Does anyone know where I can get either cheaper than that.

 

Would getting it used be an option or would that likely go out as well.

 

i got the same codes saying that i need a new front 02 sensor and a new knock sensor. But they recommend that i change the 02 sensor first and then see if the knock sensor problem goes away.
so i will be changing my 02 sensor soon and see what happens.

 

I agree with minsbang. Replace the O2 sensor first and then roll on and see what shakes out. Might save you $$.