Question about 2000 Ford Expedition

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P0125 Trouble Code

I own a 2000 Ford Expedition 4wd 5.4 V8

Recently on long trips I get a P0125 trouble code come up when I am driving on the highway.

I am trying to locate the engine temperature sensor supposedly involved, and the theromostat. My fuel economy is terrible. 8 MPG city around 14 highway. I can erase the trouble code with my code reader and it stays off, but returns when I hit the highway, sometimes weeks later.

Thanks - Lonnie

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  • Anonymous Mar 28, 2009

    I need to find out where the Engine Coolant Temperature (ECT) for a 2000 Ford Expedition, 5.4 4WD, is located. I have the diagram from Chilton but cannot find it.

  • Anonymous Mar 16, 2014

    Where is the coolant temperature located on this 4.6 L e

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  • Expert
  • 195 Answers

Hello;
Looks like the coolant temp sensor for the ecm has started to go out. Test and replace, clear codes and should be ok.
Thanks;
Rich;
RPM Northwest

Posted on Jan 27, 2009

  • Rich Palmer Jan 27, 2009

    Hello;

    Looks like the coolant temp sensor for the ecm has started to go out. Test and replace, clear codes and should be ok.

    Thanks;

    Rich;

    RPM Northwest

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How to repair P0125 for 2000 Mercury Mountaineer


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Got trouble code p0125. Car starts then idles way low then climbs back to regular idle. What is the problem?


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P0125 in a 2002 ford expedition


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Diagnostic trouble codes P0125,P0601


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Insufficient Coolant Temperature For Closed Loop Fuel Control
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Code PO732 2004 Ford Expedition


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