What could be causing the check engine light to go off?

Hello, Dave here, contributing to RepairPal and providing expert advice since 2010. What are the codes you are retrieving for the concerns you are experiencing? It is apparent that the codes are being interpreted in the incorrect way if technicians have attempted repairs unsuccessfully. Be advised that codes retrieved are merely clues that require troubleshooting to be performed to find out what needs to be done to resolve the problems. I may suggest a different shop near you help diagnose and repair your vehicle -- 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.