Question about Mazda Protege
2003 GMC Envoy didnt pass smog. Gave a code P0128 Coolant temperature below thermastat rating. Can you tell me what the likely cause is? We are not art all mechanical but if I have to take it to be repaired I dont want to be mislead. Thanks
PO128 insufficient ambient temperature.your thermostat is either sticking open or you have the wrong temperature rating it should be 195 degrees.
Posted on May 30, 2009
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Posted on Jan 02, 2017
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