My apologies if this isn't the proper place to post this.

OK...I'm deleted and tuned via MM3 and Ray's tunes. I recently started getting a DTC "P2609-No Voltage Drop Seen From Air Intake Heater". I no longer have an air intake heater. And this only seemed to start happening when the temps started to drop - but only like the low 40's. Can any of you Cummins gurus enlighten me as to what's going on here?