What usually causes it
- A failed coolant temperature sensor
- A loose, rusty or damaged plug or wire
- Low coolant, so the sensor cannot read the true temperature
- A fault in the engine computer, which is not common
P0115Starts at: Get it checked this week
Coolant temperature sensor circuit problem
The coolant temperature sensor tells the computer how hot the engine is. The computer found a problem with the sensor or its wiring.
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 stuck, jumping around or climbing
- The cooling fans running all the time or not at all
- Steam, or a sweet smell from the engine
Can I keep driving?
We rate P0115 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 P0115
What does P0115 mean?
Coolant temperature sensor circuit problem. The coolant temperature sensor tells the computer how hot the engine is. The computer found a problem with the sensor or its wiring.
Can I keep driving with P0115?
We rate P0115 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 P0115?
The most common causes, in order: A failed coolant temperature sensor; A loose, rusty or damaged plug or wire; Low coolant, so the sensor cannot read the true temperature; A fault in the engine computer, which is not common.
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.