I´ve got a message on my oki C5510 mfp printer "Failed to get printer information - Check printer". I´ve checked all cables and everything is ok. The toner light and exclamation light staying lit and saying failed to get printer information. This was after a paper jam on fuser unit. I've removed the jam and placed back the unit and drums. and the message still . I've removed all the drums and fuser unit looking for something wrong but everything seems ok. Then I've replace them back, but problem persist.

Check the toners are not empty. The printer only estimates how much it thinks should be left, there is a possibilty one is empty. this is best done by removing each toner in turn and checking that the hopper in the drum is full to level with the sponge surrounding it. Next check are the toner sensors. These are small and located to the right of each toner cartridge in the wall of the printer, one could be dirty creating the error and not allowing the printer to start up completely, causing the scanner connection to fail and giving you "Failed to get printer information". On this model the scanner and printer are essentially separate units joined by a USB cable.

I had the same problem as you. removes cartridges then audited and cleaned the toner detection cells and cartridges there is a balance to detect tried to block it. gives up and restarts the printer with the yellow reset button for my sake I had 2 empty toner