I was told by SCT that there is a voltage issue with 2011+ 5.0's. last time I talked to them still no fix. At night or in garage the lights come on and use voltage and the tune fails to load. "Charging System Error" Shaun gave me guidelines to avoid this. 1. Tune at home 2. Use trickle charger. 3. Make sure all accessories are off including auto lamp. Since then I've had no issues.
Good to know. Wouldn't a thunked it.