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    Ratchet Spanner's Avatar
    Ratchet Spanner Posts: 36, Reputation: 4
    Junior Member
    		  
    #1

    Nov 4, 2014, 04:27 PM
    Ford focus thermostat
    05 Ford Focus 2.3L engine getting a F0128 code on reader. Checked coolant level-good, rad. Fan works when it should. That leaves the thermostat, anybody out there done a remove n replace? Would appreciate any input.
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
    Uber Member
    		  
    #2

    Nov 4, 2014, 06:21 PM
    - Leaking or stuck open thermostat
    - Low engine coolant level
    - Insufficient warm up time
    - Faulty engine coolant temperature sensor
    - Engine coolant temperature sensor harness is open or shorted
    - Engine coolant temperature sensor circuit poor electrical connection

    Make sure you only use a 50/50 mixture of G-05 antifreeze and distilled water. Change the coolant every 30,000 miles. Minerals in tap water may be responsible for the thermostat sticking.
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