Intermittent check engine, o2 code high voltage other electrical...

Hello, Dave here, contributing to RepairPal and providing expert advice since 2010. Which code was set leading you to the catalyst monitor sensor for bank one? It is important to learn this to suggest direction of testing. That's what the codes are for, not to just replace parts based on guesses. You definitely have a bit of a list of concerns to address - mostly unrelated to each other. Address one area at a time. Test the circuit for the catalyst monitor oxygen sensor as noted. Determine what is causing it to set a code and warning light. Resolve the issue. It sounds like something more serious may be going on - and testing with a Ford IDS diagnostic computer is a necessary and valuable interface to get the results needed to drill down to root causes of each concern. Definitely reach out to a shop near you for further troubleshooting -- https://repairpal.com/auto-repair-near-me Click the link or call us at 877-913-1554. We'll gladly find you a certified RepairPal shop in your area.