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Old 07-28-2018, 12:12 AM   #4
Scooby Newbie
Member#: 488793
Join Date: Jul 2018

Originally Posted by Samurai Jack View Post
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.
Because it popped with e85 and not 93, and we sucked the e85 out and put 93 in, cleared the code, and it came back on after 2 seconds once we started the car again. Magic would be nice

As for fuel filter, never, its a 2016 with 10k miles.
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