9982 ground wire help

Racermt

New member
I did injectors on my truck the other weekend, when I was putting everything back together I noticed I had a ground wire hanging. I don't remember taking it off of anything and now I have dtc codes P0102 P0380 and P0540. the wire connects to the firewall above the master cylinder, anybody know what this wire is for? I will get some pictures up in an hour or so.
 
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