Here is a free HP printer support guide for you.
It will help you understand the error codes and troubleshoot accordingly to fix the HP error codes.
Error Code 10 -The error denotes a Supplies Memory Error.
The reason of the error may vary depending on your printer's make or model.
Turn off the printer and turn it back on to reset the power and memory settings.
This should fix the problem.
In case the problem persists, replace the memory chip in your printer.
Error Code 69.
x- It indicates a temporary printer glitch.
You should turn off your printer and then turn it on.
It will reset the power settings and software configurations and fix the error.
Error Code 12 -The error code indicates Printer Open or no cartridge.
It means that the top cover of your HP printer is open.
Close the cover properly and firmly.
Also make sure that holder-switch is tied up tightly.
Check back, the error code should disappear making your printer working again.
If the problem persists, check the cooling fan, toner cartridge, and the PS5 sensors.
If any one of them looks bad, replace it.
A bad DC power supply can also cause this error to occur.
Check the power outlet the printer is plugged in and the adapter also.
Make desired changes.
Error Code 13.
1/2- It indicates a paper jam in the paper feed area.
To fix this error, make sure that the paper tray has the right stack of papers.
If the paper type does not match to the specified printing format in the printer, you will see this error code.
So, load the right paper stack to get rid of this problem.
You may also consider reducing the height of the paper stack to make sure that papers go smoothly in the paper tray for printing.
If you find a projected edge on a paper or a piece of paper in the paper path, remove it from the paper tray.
Inspect the roller.
Make sure that it does not look shiny.
If it does, it's time to replace it.
If the error code still persists, turn off the printer and disconnect it from the power outlet.
Open and pull out the print cartridge.
Pull out the paper tray also.
Rotate the printer to either left or right side.
Now rotate it up and check whether the duplex panel has dislodged or not.
Gently and carefully pull out the panel in your direction and then reseat it firmly.
Make sure that it makes click sound when you lock it back.
The printer should work fine afterwards.
Error Code 13.
5/6 - It indicates a paper jam at the printer fuser.
Check the paper path, media belt and the roller that feed paper into the paper tray, toner cartridge, and fuser.
If any one of them looks bad, either troubleshoot or replace it.
To clear paper jams at the fuser area, turn off the printer and detach its power cable.
Pull out the tray-2 dust cover (or the duplexer).
Also open the rear output bin and pull the unit in your direction.
Now slowly remove the bin and the extension.
Rotate the blue fuser leavers in the up direction to unlock the fuser.
Now pull out the fuser gently while holding printer from the back.
Look for the stuck paper and pull it out gently without tearing it.
When done, reseat the fuser firmly by locking it from both the sides.
Reseat the rear output bin as well as the extension.
Plug the power cord back in the power outlet or in the printer.
Reseat the tray-2 dust cover and turn the printer back on.
The printer should work fine now.
If the error persists, replace the fuser sensors.
Error Code 21 -The Print Overrun error occurs when the printable data is very complex.
To get rid of this problem, hit the GO button to start printing.
When you do so, some data will essentially lose.
Also set the Page Protect value to Auto.
This should fix the error code.
In case the problem lingers, change your print job's font size.
Additional Tips: In case you are unable to fix your HP printer problems, contact HP printer support or HP technical support.