PCM code

[johns4dor]

HI Guys, I need some help.
I had the batteries disconnected for 3 to 4 weeks while doing some work on my 7.3. When I hooked everything back up I have a new code, P0603, Keep Alive Memory Error. Does anybody have any experience with this one. Thanks

[Ex Ford Diesel Tech]

Drive the vehicle then clear the code. This should make it go away. The system can set this code when the keep alive memory is empty. (ie batteries disconnected, pcm replaced)