hey guys need help. i checked the code i got 05 05. and it said "No Failure Recorded/Detected"

then y is my light on? i got a letter back in the day of a recall on the check engine light but what can i do? THANKS

 

reset it and wait till it comes back on again.. anything could have triggered it and then went away when you checked it..

 

ok i reset it and i checked it again. this is what i got. 0304 knock sensor. and 1008 evap canister purge volume control value. what is that? (evap canister purge volume control value)