Code #p1211
#p0541. also when going up a hill i have to push overdrive to get any real boost of power. any help with fixing the code reading is appreciated...THANKS

 

do you have a chip on your truck?

i believe that is an icp lower than normal/demanded code. might have a weak hpop

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P1211 ICP Not Controllable - Pressure Abow/Below Desired

 

P0541 is the intake air heater, you must have deleted yours...

P1211 is ICP pressure, normal code (most of the time) for a chipped truck.


What mods? Gauges? What are your readings? Would love to help, but the codes dont tell much.