Re: Temp gauge swings and code reader reads P0128
Isn't 0128 the code that gets thrown when you've got a 160 degree thermostat in the truck? The reason it gets thrown is because the engine doesn't go into closed loop until 180 and with a 160 setup, it messes it up.
I know when I installed the supercharger on my last H2, I installed a 160. On COLD days if I started the truck up and drove, the CEL would come on.
If I let it warm up completely before driving, it wouldn't come on.
Unless I'm mistaken about 0128, there shouldn't be a misfire or problem coming from it.... just a light letting you know about the disagreeance between the computer and thermostat.
Mark
|