Can't say this will work in every situation, but it's possible that the printing protocol is wrong. If you're adding via lpadmin and ipp, try lpd or vice versa.
If you're having printing issues with multiple printers (not just one or two), you may want to reset the printing system (Warning: this will remove your installed printers, and you'll have to install them again). Go to System Preferences. Select Printers & Scanners. Right-click on a printer and then select Reset printing system.... Re-add the […]