SOURCE: P0603 DTC code- internal ctrl mod kam error
"kam" is keep alive memory, which is memory in your powertrain computer that needs to always have battery power to be kept... if your battery has been disconnected, this is what caused this code to be logged. If not, you might want to check for a blown fuse to your control module or a short circuit in the wiring to your module... That is if the code is still active, if the code is a stored code it just means at some point in time the module lost power (battery disconnected, fuse pulled, ...) and now it has worked fine since...
SOURCE: PCM protection diode and PCM relay I have a diesel
Fuse #2 in the fuse box behind the driver's knee panel is the 5amp "KAM" fuse. The others,in under the hood fuse box would not be a concern as without them being good the engine will not start and no code read would be possible.
Testimonial: "that is what i needed to know, thanks"
SOURCE: DTC Code P0603 and P0231
P0231- fuel pump secondary circuit low
P0603- power train control module keep alive memory (KAM).
SOURCE: 1996 ford f250 7.3l showing p0603 kam error and p0264
keep alive memory power to pcm cylinder 2 injector circuit low
SOURCE: i got 2001 ford f350
if the smoke is white you have a water vapor problem and it will probably be your egr water cooler and oil cooler. if the smoke is blue, you may have a blown head-gasket or it could be the oil cooler also. take it to a ford dealer and let them put it on their computor, it will cost you a little but it will confirm what you may already know. hope this help's.
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