Phev burning smell econ (ev) driving. it happened 2 times after the battery drops to two bars, which means mode was changed to hybrid from econ. there were big vroom sounds from engine room when ev mode converted hybrid mode at the speed of 60-70 mph. even at the speed of 5-10 mph, the engine sound was really big (it sounded like really high rpm at the low speed). around 2-3 min driving as hybrid mode from econ, i felt very strong burning smell from the engine area. i googled and found i'm not the only person who experienced this problem. there would be problems with ev, ice, hybrid system. also it could be fire hazard when being charged.