If the temperature warning appears, pull over somewhere safe and follow the owner's manual. Steam, coolant smell, or a gauge continuing to climb are reasons to shut the engine off and get help.
Do not remove a hot radiator or expansion-tank cap. The system can remain pressurized and release scalding coolant even after the car stops.
Quick educational note
For information, not a diagnosis or repair instruction. Vehicle-specific checks are still required. Consult the manufacturer's guidance and a qualified technician.
How to use this information
This article explains general principles and does not establish what is wrong with your vehicle. Read the content limitations.