Respond to the warning
A rising temperature warning, steam or power loss can require stopping immediately when safe. Follow the vehicle manual. Continuing to drive can worsen damage. If there is fire, injury or immediate danger, call emergency services.
Leave the hot system alone
Never remove a radiator or coolant-reservoir cap while the engine is hot. Pressurized coolant can cause serious burns. Stay away from fans and moving components. Arrange assistance or towing when the vehicle cannot be driven safely.
Which detail is useful to the technician after an overheating event?
Help the technician reconstruct the event
Note whether it happened in traffic, at idle or at road speed, and whether there was steam, visible fluid or recent cooling-system service. Do not recreate the event. Cooling-system leaks, airflow and control issues require appropriate tests rather than a guessed replacement part.
Visit checklist
Choose the items you want, or print all.
Sources & further reading
General driver education. Your vehicle’s instructions, current state requirements and the technician’s findings determine the next step. A guide cannot diagnose your car or confirm it is safe to drive.