First I want to make sure -this- "Caterpillar p5000" is a forklift with tires, not the suit that Ripley wears when she tosses the evil alien back into space (which is also a 'Caterpillar P5000'). The forklift is correctly called a "Cat lift truck P5000 (a MCFA product)" while the future 'Caterpillar P5000' is a Caterpillar Inc. product and trademark.
I don't think the one RIpley ran didn't have an operators manual in the seat, but the forklift one should, and it should have an error list in the Operator's manual, about page 102 or so.
Is that 'handy' enough?
:-)


now in all seriousness,,,
If it starts and runs great, then with a code e-03, I would expect that code to be a 'historical' code that may have been introduced during troubleshooting. Does this code stay on the dash and prevent you from seeing the hour meter when the truck is running, or does it just show when the key is first turned on and gores away when the machine is running?