6.7L Cummins Forum

I purchased a 2007.5 at the end of Oct. It is in FL with my wife. It threw Code P0128-Thermostat Reliability. It stayed on for a couple of days then went off, then returned.
I will be bringing it back to VA over the Thanksgiving Holiday with a load of horses.
Any idea if this is a show stopper?
Should I replace the thermostat prior to making the drive with a loaded horse trailer?
Or will I be alright on the drive?

Thank you.

Does anyone have any ideas?
Thanks.

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2007.5 MegaCab,SRW, 4WD, Auto, Stock...
Curt Gooseneck Hitch for now. (Stick to B&W.)

It needs a new thermostat. I had the code and if anything I was running cold when it happened. The computer knows how fast an engine should warm up under given conditions and if it doesn't it throws the code. I imagine it would do it also if it sensed the engine ran to hot for the load its running, speed, outside temp etc. A new thermo will solve it. I drove mine for awhile thinking it was a temporary issue but it would reappear again and again.

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If you bad mouth farmers just make sure your mouth is empty
07.5 2500 quad, sb, auto,4x4, Big Horn. wheel to wheel nerf bars, amp bumper step
08 Jazz 36' 5er, 12,000lbs
28' PJ gooseneck,22,400 gvw

Thanks Dodgefarmer.
I will call Cummins or Dodge tomorrow.

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2007.5 MegaCab,SRW, 4WD, Auto, Stock...
Curt Gooseneck Hitch for now. (Stick to B&W.)