What usually causes it
- A failing coolant temperature sensor
- A thermostat (the valve that controls engine temperature) stuck open or partly open
- Low coolant or air in the cooling system
- A loose plug or damaged wiring
P0116Starts at: Get it checked this week
Coolant temperature reading does not make sense
The coolant temperature sensor tells the computer how hot the engine is. Its reading does not match what the engine is doing.
Check this first
Only when the engine is fully cool, look at the coolant level in the plastic tank. Never open the radiator cap on a hot engine.
What to watch for
- The temperature gauge climbing into the hot zone
- Steam, or a sweet smell from the engine
- The heater blowing cold air
Can I keep driving?
We rate P0116 as Get it checked this week. It is not an emergency yet, but it can get worse. If the light starts flashing, stop driving soon.
Quick answers about P0116
What does P0116 mean?
Coolant temperature reading does not make sense. The coolant temperature sensor tells the computer how hot the engine is. Its reading does not match what the engine is doing.
Can I keep driving with P0116?
We rate P0116 as Get it checked this week. It is not an emergency yet, but it can get worse. If the light starts flashing, stop driving soon.
What usually causes P0116?
The most common causes, in order: A failing coolant temperature sensor; A thermostat (the valve that controls engine temperature) stuck open or partly open; Low coolant or air in the cooling system; A loose plug or damaged wiring.
Estimates only. A mechanic should confirm. The same code can mean slightly different things on different cars; the app explains it for your exact year, make, model and mileage.