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Odd. If the codes are not staying then you have more than one problem. One thing about OBD II even if there isn't a direct fault that created the code--the code still stays there since with OBD II there is no current/history codes.. Some codes take 30 cylces to even turn the ses lamp off and so many to have the code just go away.. As far as a p0300--that code isn't going going to tell you anything--except you have a missfire in more than one cylinder--its the data thats going to tell you what cylinders are the issue.....
Odd. If the codes are not staying then you have more than one problem. One thing about OBD II even if there isn't a direct fault that created the code--the code still stays there since with OBD II there is no current/history codes.. Some codes take 30 cylces to even turn the ses lamp off and so many to have the code just go away..
As far as a p0300--that code isn't going going to tell you anything--except you have a missfire in more than one cylinder--its the data thats going to tell you what cylinders are the issue.....
