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2020 Prius Prime (plugin basic) won't start in extreme cold.

Mods please move this if required.

I joined this group in hopes that someone may have an answer for my problem as per below:

Equipped;
2020 Prius prime (plugin basic)
-30+ C weather in NWT Canada
Fully charged LILO battery
Fully charged 12v battery
Battery blanket, Block heater and
Synthetic oil rated for NWT winters.


Attempt to start;
Break peddle down, push button, electronics (lights Nav etc) work. Engine does not crank, nor does EV mode engage.

I am at my wits end. Is this a design flaw for -30C++ (-50C) weather?

Thoughts?

I have already broken the Guinness EV hypermiling record with My Prius Prime with over 7.0 miles per kWh round-trip, and now @Salamander_King (pictured below) is trying to beat my record with his new Ford Mustang Mach-E.

For maximum EV efficiency, stick to 25 miles an hour, ignore angry drivers

‘Hypermilers’ in pursuit of extreme fuel efficiency in electric cars invite road rage with painfully slow driving


Fergal McGrath after setting a Guinness World Record last year for lowest energy consumption driving from John O'Groats in Scotland to Land's End in England in an electric car. FORD

By Mike Colias

Jan. 18,...