The engine coolant temperature sensor is not within expected range.
Informational only. Consult a qualified mechanic.
Check thermostat operation and coolant level.
The P0116 OBD-II diagnostic trouble code (DTC) indicates: ect sensor range/performance. This is a medium-severity powertrain code that your vehicle's onboard diagnostics system triggers when the engine coolant temperature sensor is not within expected range. If your check engine light is on with this code, the vehicle is generally safe to drive, but you should have it inspected soon.
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