Recently sent off my ECM to be tuned, once i got it back and in the truck, the "diesel preheat in progress" light flashes relentlessly. I called the company and they said that it is a "physical issue", which they're unable to do anything about. I have checked all the wiring for the ECM, nothing is bent, all connectors are good, even check the passenger side connector by the front of the engine. looking for any insight.