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2003 Ford Expedition Question: My engine service light came on, and i hook up my Dianostic OBDII and code reads

 

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kpn5205, Fayetteville, NC, October 10, 2012, 15:17
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diagnostic reads PO128, What do I need to do or replace. Thank you KP5205

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  • Answer #1

    joelburke26 from Joels Auto Service, October 10, 2012, 17:45
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     Master

    thats a low coolant temperature code.your thermostat may be stuck open.i would replace the thermostat.

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