Auto start and power steering issues
 

Recently got an 05 sts with a 3.6 with a new motor in it and has engine codes. Code reader shows 3 codes PO348 PO010 AND PO332 car runs fine my dad had the car before me and says he noticed 3 damaged wires under the hood on a harness. Haven't located them yet but I'm hoping those are the reason for the codes. I'm getting 25 ish on the highway at 73 mph have read that one or two of those codes from failed sensors cause lost mpgs. Can I just solder or splice them together? Also having power steering issues. Have to add fluid constantly. Any info about causes of possible leaks would be helpful