P0603 what is the ECM and how do you replace it or reprogram it?

Question

2003 Ford Super Duty 7.3L Diesel with code P0603, what is the ECM and how do you replace it or reprogram it?

Answer 1

F250 2000  p0603 internal control mdul cam error how and wat due I need to fix it I change the glow plugs already

Answer 2

P0603 FORD - ECM Keep Alive Memory Test Error

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