Overheating
Taking Action with Overheating
If the engine coolant temperature gauge indicates overheating and the high engine coolant temperature warning light 
is displayed, the vehicle loses power or you hear a loud knocking or pinging noise, the engine is probably too hot.
Do not open the hood while steam is escaping from the engine compartment.
If the hood is opened while the engine compartment is hot, steam and scalding hot coolant may shoot out and cause serious injury. In addition, even if steam is not escaping, some parts in the engine compartment may remain at high temperature. Be extremely careful when opening the hood.
Do not touch rotating parts such as the fan or belt when inspecting inside the engine compartment.
Working near the cooling fan when it is running is dangerous. The fan could continue running indefinitely even if the engine has stopped and the engine compartment temperature is high. You could be hit by the fan and seriously injured.
Do not remove either cooling system cap when the engine and radiator are hot.
When the engine and radiator are hot, scalding coolant and steam may shoot out under pressure and cause serious injury.
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Drive safely to the side of the road and park off the right-of-way.
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Put a vehicle with an automatic transmission in park (P), a manual transmission in neutral.
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Apply the parking brake.
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Turn off the air conditioner.
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Check whether coolant or steam is escaping from the engine compartment.
If steam is coming from the engine compartment:
Do not go near the front of the vehicle. Stop the engine.
Wait until the steam dissipates, then open the hood and start the engine.
If neither coolant nor steam is escaping:
Open the hood and idle the engine until it cools.
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Make sure the cooling fan is operating, then turn off the engine after the temperature has decreased.
If the cooling fan does not operate while the engine is running, the engine temperature will increase. Stop the engine and call an Authorized Mazda Dealer.
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When cool, check the coolant level.
If it is low, look for coolant leaks from the radiator and hoses.
If you find a leak or other damage, or if coolant is still leaking:
Stop the engine and call an Authorized Mazda Dealer.
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Cooling system cap
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Coolant reservoir
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Cooling fan
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Radiator
If you find no problems, the engine is cool, and no leaks are obvious:
Carefully add coolant as required (Search).
If the engine continues to overheat or frequently overheats, have the cooling system inspected. The engine could be seriously damaged unless repairs are made. Consult an Authorized Mazda Dealer.
