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Overheating sensor alarm comes on

Kevin T
Kevin T
in Ford Focus Club

Featured Replies

Overheating sensor alarm comes on when engine is normal running temperature. I have replaced the thermostat and the engine temperature sender. I have also replaced the cooling fan module  but all to no avail! After the alarm comes on you can literally wait a minute and drive a further mile before it all happens again. Car does not boil up, but in diagnostic readings it says it is 111 degrees but by probe it is normal temperature. 

Has anyone got any ideas? 

   

  • Quote


    1 hour ago, alexp999 said:

    What engine

    I feel an OPW coming on

  • Quote
    • Haha 1
    • Author
    21 hours ago, alexp999 said:

    What engine

    1.6variable valve petrol engine.

  • Quote

    Does the temperature reading via OBD change at all or does it seem stuck on 111? 

  • Quote
    • Author

    It is always on 111. 

    When the fan is on and it is saying engine temperature too high. 

  • Quote
    4 minutes ago, Kevin T said:

    It is always on 111. 

    When the fan is on and it is saying engine temperature too high. 

    I don't know what Diagnostic Tool you are using, but there may be separate Sensors for Water, Cylinder Head and Oil Temperatures. You need to monitor all of them to see if one of them is giving a spurious reading.

    They should normally be within about 5 Degrees of each other in normal driving.

  • Quote
    • Like 1
    • Author

    Thank you. I will try that. 

  • Quote

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