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"Pending codes" (not quite sure what this means) P0301 Cylinder 1 misfire detected.
A pending code is when something is detected, but it hasn't reached the threshold to set the code. For example, if Code XYZ is set when condition ABC happens 5 times. But so far, it's only happened twice. So Code XYZ becomes a "pending" code.
 

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I'm not up on interpreting numbers, but when I see "lean", my mind quickly thinks "air leaks".
 
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