Engine temperature warning light
Also called: coolant temperature light, overheating light
The engine is overheating. Pull over and let it cool.
What it means
This light comes on when the coolant temperature gets too high. A blue version of the same symbol on some cars just means the engine is still cold. Red means hot. Running an overheating engine can warp the cylinder head and blow the head gasket.
Green, yellow, red: three ways this can look
Match your situation to the closest example.
Keep an eye on it
It came on briefly in stop-and-go heat, went off once moving again, and the coolant level is full. Watch it and have the cooling fan checked.
Schedule a repair
It comes on more often, the gauge runs higher than normal, or coolant keeps getting low. Book a visit before it turns into a breakdown.
Stop and get help
Steam, a sweet smell, the gauge pegged hot, or the engine losing power. Pull over and shut it off. Never open a hot radiator cap.
Common causes
- Low coolant from a leak
- Cooling fan not running
- Stuck thermostat
- Failing water pump
- Clogged radiator
- Head gasket leak
What to do right now
- Turn off the A/C and turn the heater to full hot to pull heat from the engine
- Pull over and shut the engine off if the gauge stays high
- Let it cool at least 30 minutes before checking coolant
- Don't keep driving it hot to get home
Related guides
Symbols and meanings vary a little by make and model. Your owner's manual has the exact meaning for your vehicle.
Other warning lights
Questions
What does the engine temperature warning light mean?
The engine is overheating. Pull over and let it cool. This light comes on when the coolant temperature gets too high. A blue version of the same symbol on some cars just means the engine is still cold. Red means hot. Running an overheating engine can warp the cylinder head and blow the head gasket.
Can I keep driving with the engine temperature warning light on?
Green: It came on briefly in stop-and-go heat, went off once moving again, and the coolant level is full. Watch it and have the cooling fan checked. Yellow: It comes on more often, the gauge runs higher than normal, or coolant keeps getting low. Book a visit before it turns into a breakdown. Red: Steam, a sweet smell, the gauge pegged hot, or the engine losing power. Pull over and shut it off. Never open a hot radiator cap.
What causes the engine temperature warning light?
Common causes: low coolant from a leak; cooling fan not running; stuck thermostat; failing water pump.
Skip the shop. We'll come to you.
Book online in about a minute, or call or text the office. We'll confirm the details and get a mechanic headed your way.