I am attaching the info that you requested. However, I suspect whatever the issue is, we have some codes. So let's start there. Here is a guide on how to check for codes:
https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing
Once we know what codes are there we will better know what damage is done. However, it is unlikely that the issue is a shorted wire as that will normally not cause a decrease in fuel mileage. There is a chance that this is the cause but we will only find it out if we pull codes for the check engine light and go from there. Thanks
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Wednesday, December 2nd, 2020 AT 5:41 PM