TOYOTA 2013 Prius PHV - Manual (Page 167)

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1-2. Charging
PRIUS PHV_OM_OM47787U_(U)
When normal charging cannot be carried out
If charging does not commence even though the correct procedure
has been carried out, and an error message is shown on the multi-
information display, try the correction procedures listed in the table
below.
If you still cannot correct the problem, contact your Toyota dealer.