Check engine light came on (blinking pattern). The lead manager at Crutcher's quickly identified P1326 error on my 2018 Hyundai. He also researched the database in his office and offered the best solution: go to the dealership. He said that if they touched the engine of my car, it would void the warranty. That was an honest and correct answer. It may be hard to find an honest mechanic, but I trust Crutcher's based on my experience.