2023-2026 Honda Civic 4 Door Handling the Unexpected -> Overheating User Manual
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Handling the Unexpected -> Overheating for Your Honda Civic 4 Door Eleventh Generation (2023-2026)

Overheating  
Models with Auto Idle Stop  
How to Handle Overheating  
Overheating symptoms are as follows:  
1How to Handle Overheating  
Models with B-type meter  
3WARNING  
Steam and spray from an overheated  
engine can seriously scald you.  
H
The temperature gauge is at the  
mark or the engine suddenly loses power.  
All models  
The Engine temperature too hot. Do not drive. Allow engine to cool.  
message appears on the driver information interface.  
Steam or spray comes out of the engine compartment.  
Do not open the hood if steam is coming  
out.  
First thing to do  
1. Immediately park the vehicle in a safe place.  
NOTICE  
Models with B-type meter  
2. Turn off all accessories and turn on the hazard warning lights.  
u No steam or spray present: Keep the engine running and open the hood.  
u Steam or spray is present: Turn off the engine and wait until it subsides.  
Then, open the hood.  
Continuing to drive with the temperature gauge at  
the  
H
mark may damage the engine.  
All models  
Continuing to drive with the Engine temperature  
too hot. Do not drive. Allow engine to cool.  
message on the driver information interface may  
damage the engine.  
Continued  
789  
uuOverheatinguHow to Handle Overheating  
Next thing to do  
1How to Handle Overheating  
1. Check that the cooling fan is operating and  
stop the engine once the Engine  
temperature too hot. Do not drive.  
Allow engine to cool. message on the  
driver information interface disappears.  
u If the cooling fan is not operating,  
immediately stop the engine.  
3
WARNING  
Reserve Tank  
Removing the radiator cap while the  
engine is hot can cause the coolant to spray  
out, seriously scalding you.  
MAX  
Always let the engine and radiator cool  
down before removing the radiator cap.  
2. Once the engine has cooled down, inspect  
the coolant level and check the cooling  
system components for leaks.  
MIN  
If the coolant is leaking, contact a dealer for repairs.  
u If the coolant level in the reserve tank is  
low, add coolant until it reaches the  
MAX mark.  
Use water as an emergency/temporary measure only.  
Have a dealer flush the system with proper antifreeze  
as soon as possible.  
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.  
Last thing to do  
Once the engine has cooled sufficiently, restart it and check the driver information  
interface.  
If the Engine temperature too hot. Do not drive. Allow engine to cool.  
message does not appear, resume driving. If it appears again, contact a dealer for  
repairs.  
790  
uuOverheatinguHow to Handle Overheating  
Models without Auto Idle Stop  
How to Handle Overheating  
Overheating symptoms are as follows:  
H
1How to Handle Overheating  
The temperature gauge is at the  
mark or the engine suddenly loses power.  
3WARNING  
Steam and spray from an overheated  
engine can seriously scald you.  
The Engine temperature too hot. Do not drive. Allow engine to cool.  
message appears on the driver information interface.  
Steam or spray comes out of the engine compartment.  
Do not open the hood if steam is coming  
out.  
First thing to do  
1. Immediately park the vehicle in a safe place.  
2. Turn off all accessories and turn on the hazard warning lights.  
u No steam or spray present: Keep the engine running and open the hood.  
u Steam or spray is present: Turn off the engine and wait until it subsides.  
Then, open the hood.  
NOTICE  
Continuing to drive with the temperature gauge at  
the  
H
mark may damage the engine.  
Continuing to drive with the Engine temperature  
too hot. Do not drive. Allow engine to cool.  
message on the driver information interface may  
damage the engine.  
Continued  
791  
uuOverheatinguHow to Handle Overheating  
Next thing to do  
1How to Handle Overheating  
1. Check that the cooling fan is operating and  
stop the engine once the temperature  
gauge goes down.  
3
WARNING  
MAX  
MIN  
Removing the reserve tank cap while the  
engine is hot can cause the coolant to spray  
out, seriously scalding you.  
u If the cooling fan is not operating,  
immediately stop the engine.  
2. Once the engine has cooled down, inspect  
the coolant level and check the cooling  
system components for leaks.  
Always let the engine and radiator cool  
down before removing the reserve tank  
cap.  
Reserve Tank  
u If the coolant level in the reserve tank is  
low, add coolant until it reaches the  
MAX mark.  
If the coolant is leaking, contact a dealer for repairs.  
u If there is no coolant in the reserve tank,  
check that the radiator is cool. Cover the  
reserve tank 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.  
Use water as an emergency/temporary measure only.  
Have a dealer flush the system with proper antifreeze  
as soon as possible.  
Last thing to do  
Once the engine has cooled sufficiently, restart it and check the temperature gauge.  
If the temperature gauge has gone down, resume driving. If it has not gone down,  
contact a dealer for repairs.  
792  

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