Honda CLARITY Plug-In Hybrid 2020 Owner's Manual page 550

uuOverheatinguHow to Handle Overheating
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Next thing to do
MAX
MIN Reserve Tank
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Last thing to do
Once the engine has cooled sufficiently, turn the power system on.
If the Stop Driving When Safe. Engine Temperature Too Hot message does not
appear, resume driving. If it appears again, contact an authorized Honda Clarity
Plug-In Hybrid dealer for repairs.
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1. Check that the cooling fan is operating and
turn the power system off once the Stop
Driving When Safe. Engine
Temperature Too Hot message
disappears.
u If the cooling fan is not operating,
immediately turn the power system off.
2. Once the engine has cooled down, inspect
the coolant level and check the cooling
system components for leaks.
u If the coolant level in the reserve tank is
low, add coolant until it reaches the
MAX mark.
u If there is no coolant in the reserve tank,
check that the radiator is cool. Cover the
radiator cap with a heavy cloth and open
the cap. If necessary, add coolant up to
the base of the filler neck, and put the
cap back on.
1The Stop Driving When Safe. Engine Temperature Too
Hot Message Appears on the Multi-Information Display
WARNING
3
Removing the radiator cap while the
engine is hot can cause the coolant to spray
out, seriously scalding you.
Always let the engine and radiator cool
down before removing the radiator cap.
If the coolant is leaking, contact an authorized Honda
Clarity Plug-In Hybrid dealer for repairs.
Use water as an emergency/temporary measure only.
Have an authorized Honda Clarity Plug-In Hybrid
dealer flush the system with proper antifreeze as
soon as possible.