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2004 BMW X5 Question: service engine soon (p0128)

 

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tadeen, 4.4L V8, Keller, VA, September 14, 2011, 11:16
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service engine soon came up and i use my scantool to read and get p0128 and clear it and it cameup again a week after. Please what do i do?

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  • Answer #1

    September 14, 2011, 13:09
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     Technician

    P0128 Engine coolant temp sensor

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  • Answer #2

    September 14, 2011, 15:20
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     Master

    I would make sure your thermostat is working correctly before jumping to any conclusions. it is the most common failure for the 128 code.

    Roy

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    Angelo2975, September 14, 2011, 18:47
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     Technician

    mastertch6371 your correct i forgot to add that

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  • Answer #3

    September 14, 2011, 18:48
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     Master

    Change thermostat.

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  • Answer #4

    September 14, 2011, 19:58
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     Journeyman

    this is obd2 trouble code table,http://www.chinasinoy.com/service/how-to-understand-trouble-codes-37.html
    it can help you understand the meaning of the code, for this code, 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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  • Answer #5

    patrick mannion from Greg Solow's Engine Room, September 14, 2011, 22:06
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     Master

    Yep! BMW, thermostat issue.

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    mastertech6371, September 15, 2011, 06:19
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     Master

    yep, what a surprize.

    roy

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