Hey mustang Guys. I'm new to the whole mustang world. But I have a Service engine soon light on my dash and it won't go away. I Did the on board diagnosic and I had a DT code: (Bay 1) that's all it said. Then I had a DTC code it was A103. Then Autozone cleared all of them except the DT code. The DT code would not go away. And I tried taking the negative battery terminal off for about an hour. That didn't work. Maybe I can get some help here?