You see, folks are saying their HP Smart app is displaying the “ Printer status unknown ” error, suggesting the app is not able to communicate with the printer.

If you see HP Printer Error Code E3, then check the solutions mentioned in this guide. The issue is usually caused because of the carriage.

Fast forward to today, and HP has admitted that the error was programmed into their firmware, to stop customers from using third party ink cartridges.

HP is working to address a bad firmware update that has been bricking HP Office Jet printers worldwide since it was released earlier this month.