i just replace my knock sensor but im still getting the code...better yet im getting two other ones that werent there before 1001 0901 both 02 sensor heaters? i just replaced my y-pipe with a warpspeed one...oh and its making a sputtering exhaust noise...any info would be helpful

 

this might be a dumb question but did you reset the ECU after ou replaced the sensor, and your getting a sputtering exhaust noise so either the O2 sensors are not in properly or you have a leak somewhere, turn the ECU screw clockwise until you hear something like a CD player reading a CD for 5 sconds then turn it back and do that twice for it to reset the ECU while the ignition is in the on position

 

After you replaced the y-pipe, did you plug the O2 sensors back correctly? Recheck the O2 sensors. The O2 sensors are setting off the KS code so don't worry about the KS.

Take out the O2 sensor connectors and reconnect them tightly and reset the ECU and see if it comes back.