Sorry, i'm frustrated.
Forget about the trouble code. Is it safe to drive a 17,000lb F-550 in "ANY" other tune then the econ/tow. Like I mentioned above, with that kind of weight on my truck, I "assume" it's just like towing as far as the engine is concerned. The 85 hp tune says "not" to tow with ...

Thanks so much, really appreciate all the help...

I have a Predator U7170 version 9R04 on my 2000 Ford F550. I'm getting a fault code of P0541 "Intake Air Heater A circuit low".

1. Can anyone explain what that fault might be?

2. I have 3 performance settings to choose from (Tow/Econ, 85 H.P. and 110H.P.) and with my truck weighing 17000 lbs. I ...