Cleared and check engine light came back the next day. Will be checking in a few hours to see the code
Would an improper terminal connection to battery cause a p0300?
Still a P0300 code.
I look at the monitors and everything was ready besides Catalyst, evaporation system, and oxygen sensor.
Opened up the hood to see if I could hear any hisses for leaks and I cant even tell, its way too loud. I did hear something similar to hiss though.
1100 rpm on idle