This morning when I started my car (2011 FFH) it went straight to ICE mode (no EV) and immediately started making an annoying buzzing sound from the dash which lasted a good 5 minutes while driving to work. This is the first time I've experienced this sound but I've only owned the car since August. Has anyone else experienced this? What could this sound be? It was 29 degrees and I'm pretty sure the sound has something to do with the cold.