Just went on a short 10 minute trip and my 07 MMH would not go into EV MODE. I put it in park and I could only slightly rev the ICE stepping hard on the throttle. Other than that it drove normally. Only 30,000 miles on it, well cared for, all dealer maintenance. The only potential issue I can think of is the engine air filter is due for replacement. Systems all report normal. Its 74 degrees today.