Archived Unlisted code

[hubie43]

Maybe someone could give me the meaning of a DTC, p-0128. This code is neither listed in the shop manual or on this forum that I can find. I don't know if I should be worried or not? thanks in advance... ... ..... Johnny Mack

 

[Bob Wagner]

thermostat rationality

 

[hubie43]

Thanks for the quick responce, Bob. I don't understand why that code isn't listed in my shop manual. I suspect your responce is correct though, the engine has been running cooler than normal operating temperature. Thanks again