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2003 Mazda Mazda6 Question: Codes P0126 (2), and P0128 were set and car overheated, what does this mean

 

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Visitor, 3.0L V6, Mystic, CT, July 28, 2011, 16:38

The car overheated, check engine light was on, Code P0126 (Coolant Temp insufficient stable operation) was set twice, and Code P0128 (Coolant Temp below regulating Temp) was set. Any ideas as to the likely culprit for all 3 events happening?

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  • Answer #1

    patrick mannion from Greg Solow's Engine Room, July 28, 2011, 20:11
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     Master

    Low coolant level or a failed thermostat are the likely causes. Hopefully the engine did not overheat too badly. Autozone have some popular workshop manuals for free on line once you register (for free) on their website http://bit.ly/autozone_repair_info. There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online

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  • Answer #2

    chinasinoy July 29, 2011, 04:28
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     Journeyman

    for p0128, you can try this
    Verify coolant strength & level
    Verify proper cooling fan operation (check if it's running more than it should). Replace if necessary.
    Verify proper engine coolant temperature (ECT) sensor operation, replace if necessary.
    Verify proper intake air temperature (IAT) sensor operation, replace if necessary.
    If the above items check out good, replace the thermostat

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