P0128

[gamudslinger88]

I keep getting a P0128 engine coolant temp low code. Is this a stuck open thermostat or something along those lines? I used to get it seldom when I had the old motor and when it was very cold out. Now since the engine swap I have gotten it 3 times in 3 days with outside Temps about 65. It doesn't seem to take long to warm up.

 

[clrussell]

Yep change thermostats.. What usually happens is the rubber deteriorates and coolant flows on by.

Basically like a half stuck open stat


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[gamudslinger88]

That's crazy they looked fine when I swapped the engine. Lol. So what's everyone going with? Stock or high temp? I rarely tow but when I do its a 8k lbs 5th wheel and I live in Georgia. About 95 to 105 with 80%+ humidity in the summer and winter down to 10 and 15 degrees.

 

[clrussell]

Just put oe back in it..

Unless you do a lot of hard core towing. Then the mishimoto low temp are good


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