Welcome back:
Honestly, what they said makes sense. Especially if it is running normally now, I wouldn't be too concerned. As far as the 100 miles, 38 years in the business and I never heard of such a thing. Drive it as much as you can before going away. If the light stays off and it runs fine, I'm sure you will be okay.
If you do have trouble on the trip or when you reach your destination, I'm always here. Let me know and I'll do my best to help.
Take care and enjoy the trip. Don't worry. If something is going to happen, it will before you leave.
Joe
Saturday, June 15th, 2019 AT 5:33 PM