code p0603

[jay033507.3]

internal control mod kam error is this just a sensor or what truck wont start when the engine is cold and this code keeps coming up what do i need to do 03 f350 7.3

[vitalidle]

Are you running a tuner or have you disconnected your batteries lately? If so that will throw that code. Have you checked your glow plug relay or gp's?

[SCUFFY828]

have you been runing a programmer or plug in chip of any kind, if so have you tried to change programs , or anything , its possible to have wiped the pcm mmemory, need to know that first

[jay033507.3]

i have a super chip programmer yes i have changed programs

[jay033507.3]

no i have not checked gp relays or gps

[SCUFFY828]

if you changed programs , that will give you that code , you may have another issue , also are you sure when you changed programs , was it allowed to finish correctly

[jay033507.3]

yes. but i changed programs last week and this started yesterday morning

[jay033507.3]

i also cleared the dtcs 3 times and this keeps coming up

[SCUFFY828]

thats gonna be a tough one ,i guess its possible for the pcm to have taken a dump, its few and far between you see that, does the wait to stat light come on when the key is cycled

[jay033507.3]

yes it does if i set it back to stock might that work