I had a bad o2 sensor which set off my CEL. When I ran the diagnostic I also code the 0304 knock sensor code. After getting the o2 sensor fixed and the ecu reset, I want to see if the knock sensor code is still there. I ran the diagnostic but its not blinking at all. Does that mean theres no codes?

 

Normally mine runs 0505 when there are no codes. Not blinking might also work. Sometimes the ECU will show KS and o2 when only one is bad.

 

mine does 05 05