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How to fix po128 code
on this van

(2002 GMC Safari)
in Baldwinsville, NY on December 17, 2012
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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Popular Answer
on December 17, 2012
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.
on December 18, 2012
thank you.. I will try that
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