Non original backup camera rear view Mirror causing interference

Hello, Dave here, contributing to RepairPal and providing expert advice since 2010. It sounds like something has tapped in to the data link wiring for power to that mirror, causing an issue with diagnostic testing with a diagnostic tool. However, air conditioning concerns often are not related to module-based direction. In other words, a diagnostic tool is like not needed for this concern. I definitely recommend restoring the wiring back to as new condition from the factory. Removal and repair of the wiring modifications will help get things back to normal. Hands on testing testing is needed for the air conditioning system, including the climate control system inside the car, as well as the refrigerant system under the hood. The folks that replaced the components thus far should be able to recheck their work. However, definitely reach out to a shop near you for help if you need a new opinion. 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.