Prius has it too.
Turtle Light - Appears when:
Driving a Prius with the battery-pack extremely drained of electricity, in conditions too hot (typically above 105 F degrees), or conditions too cold (typically below -10 F degrees), so that an orange "turtle" icon displays near the speedometer. This warns the driver to avoid forceful acceleration.
Nothing you really can do except to avoid use of the battery. Also, relax, the battery fan will automatically turn on as needed IF it starts overheating.
Read more:
http://priuschat.com/threads/tortois...#ixzz3PgIO1i7e
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