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2002 GMC Safari Question: how to fix po128 code on this van

 

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Bobby97, Baldwinsville, NY, December 17, 2012, 15:24
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I am trying to determine how to diagnose a PO128 error code on a 2002 GMC Safari. I would appreciate any info anyone might have on this

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  • Answer #1

    December 17, 2012, 20:16
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     Master

    Here's the obd code: http://www.obd-codes.com/p0128
    I would suggest if the coolant level and strength are good, it is probably a bad thermostat that needs replaced.

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    Bobby97, December 18, 2012, 16:36
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    thank you.. I will try that

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