You will see this code on the control panel of the printer while you are trying to scan. It might show up when you try to scan some heavy book or documents. There is no need to worry as you can fix it easily by following these simple steps from 123.hp.com/setup:
Turn on the printer and wait till it is in an idle state
Remove the printer from the power supply and wait for a minute or so
Plug the cables back and reconnect the power cord utility to the back part of the printer and switch it on
Let it pass through the warm up stage and wait till the light on the printer blinks. This will fix the issue and try putting one sheet at a time in the scanner
If you still face any issue then just visit 123.hp.com/setup and get help instantly from the experts.