1. Main functions
Measures engine coolant temperature.
Sends temperature signals to the ECU.
Helps regulate the engine cooling fan.
Helps control fuel injection during cold starts.
Supports engine temperature monitoring.
Helps prevent engine overheating.
2. Common symptoms of a faulty sensor
Engine temperature gauge gives incorrect readings.
Cooling fan operates continuously or fails to operate as expected.
Difficult cold starting.
Increased fuel consumption.
Check Engine warning light.
Incorrect temperature readings on a diagnostic scanner.