Toyota PRIUS 2014 Manual page 606

5-2. Steps to take in an emergency
STEP 5
STEP 6
Start the hybrid system and check for the multi-information
display.
If the message does not disappear:
Stop the hybrid system and contact your Toyota dealer.
If the message is not displayed:
Have the vehicle inspected at the nearest Toyota dealer.
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Add coolant if necessary.
Water can be used in an emer-
gency if coolant is unavailable.