. . . "Read article that says there is a software update for the PCM. Honda dealer says he never heard o...Answer(2 Answers)Flag thisJanuary 10, 20132004 Honda CivicscrewcrewExeter, NHShould I replace my Heater Core?So my windows started fogging up on my recently, my temp gauges are normal, I see no leaking inside the car anywhere, and the heat and AC work just fine." .