consistant 21.3:10 errors after the interconnect pca and service station had been replaced. Still recieving 21:13 error. Even entering into diagnostics and performed and tested the travel 0f the maint cartrigde.

21:13 is Service Station Jam. You should check nothing is broken or blocking the maintenance cartridge and mechanics.

21.04:03 is overcurrent in Service Station. You should check nothing is broken or blocking the maintenance cartridge and mechanics.

21.03:10 is faulty in rack engage motor in Service Station. You should check nothing is broken or blocking the maintenance cartridge and mechanics.

You should check all the Service Station for issues and replace the maintenance cartridge. I hope this information helps.