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Old 07-27-2018, 12:10 PM   #2
Samurai Jack
Scooby Guru
 
Member#: 21145
Join Date: Jul 2002
Chapter/Region: NESIC
Location: Not in my own time
Vehicle:
2002 Enemy of Aku

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You have only scratched the surface of what could be causing a P0301 CEL.
You've done the basics but now you have to look deeper.

Google P0301 and you will see the L-O-N-G list of possible problems.

When was the last time you changed your fuel filter?
How do you know it's not a bad batch of gas? Just because you "switched back" to a 93 grade does not mean you do not have a bad batch of gas.

And if it was a bad batch of gas, the CEL would not just automatically disappear like magic just because you went up to a higher grade fuel.
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