My check engine light stays on and the engine sounds rough

I took it into the Toyota Dealer where I originally purchased the auto three times and they still cannot fix the issue. First they claimed it was the airflow sensor and they replaced it. It corrected the problem for 15 minutes and the light came on. Then they said it was a problem with the fuel I was filling it up with. Then they said I should add an additive to clean the engine. It still has not corrected the issue.

Do you have the codes thar are triggering the engine light? It woukd be helpfull to pinpoint the system that is triggering tge light. Based on our breif conversation it sounds like an egr or air leak issue either systems would cause a symptom of rough running