Hummmm, I'm not sure how to write this up. Feel free to update this rough draft:
In very slippery winter conditions, limited to 2004-2007(?) model year Prius with OEM or non-winter tires, the traction control avoids spinning the tires and can leave the car immobile. Those in snowy, winter climates should mount quality ice and snow tires in the winter season. More recent Prius or those whose ECU was flash upgraded(?) have an improved traction control that will 'pulse-spin' the wheels in super slippery, icy conditions.
Is this about right or do we need more?
Thanks,
Bob Wilson