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Engine Coolant Temperature Sensor

By Bret Bodas, April 22, 2008

The engine coolant temperature sensor measures the temperature of engine coolant and transmits the data to the vehicle computer systems.

Symptoms of a Bad or Failing Engine Coolant Temperature Sensor

  • Check Engine Light may illuminate with an engine coolant temperature sensor code
  • Vehicle may be hard to start
  • Poor fuel mileage

Engine Coolant Temperature Sensor Related Repair Advice

  • When replacing the engine coolant temperature sensor, always use a factory (or equivalent) part, inspect the electrical connections, and ensure the entire cooling system is in good working order with fresh, clean coolant
  • An engine coolant temperature sensor code is not always caused by a defective sensor. It can be triggered by a defective thermostat, defective wiring, rusty coolant, or an overheating engine.

1 User Comment

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By , December 31, 2010
You really need to check your raditor cap, they told me it was they sencor changed still same problem changed cap fixed problem purchased it at advance auto $8.00

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