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



Bobby97, Baldwinsville, NY, December 17, 2012, 18:24

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, 23:16

    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, 19:36

    thank you.. I will try that

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