I had the problem with no dash or lights and no start.
Turns out the main ignition wire at the power relay near the step was corroded and broken.
Now I have a dash, dash lights, relays clicking etc like it wants to fire up. Cranks fine. New full propane tank. But NO START. No cylinders firing.....doesnt even fire or want to start. Just crank

E03 code on the dash. HELP
Where do I start? I dont know if this a fuel flow issue? Or plugs not firing?
Please someone have any tips?

Thank you