E4 Error code on 5101 smart tank

[NicoleG999]

This printer is a year and a half old? Maybe? All of a sudden the other day it wouldn't print anymore. Said E4 error code. I checked all the usual suspects, nothing. Have watched endless videos, and nothing. I finally took the entire top off today, and STILL NOTHING. There IS NO PAPER JAM. I followed instructions to check a few areas, cleaned a few things, then it briefly threw an E3 error code...but then right back to E4. Everything is rolling as it should, moving, cleaned, etc. What am I missing?! This is ridiculous.

[Pallipurath]

Hi @NicoleG999,

Welcome to the HP Support Community.

Thank you for posting your query.

I am sorry to hear that you see E4 error code on an HP Smart Tank 5101 generally indicates a paper jam, but as you've mentioned that there are no visible obstructions and other common troubleshooting steps haven't resolved the issue, I would request you to please follow the steps:

Power Reset

• Turn off the printer.
• Unplug the power cord for at least 60 seconds.
• Plug back in and restart.
• This clears temporary error states.

Run HP Smart Diagnostics

• Install the HP Smart app on your PC or phone.
• Use Diagnose & Fix under printer settings.
• This can reset error codes and confirm sensor issues.

Firmware Update

• Go to HP Support → Drivers & Downloads → enter HP Smart Tank 5101.
• Download and install the latest firmware.
• Updates often fix false jam detection.

Clean Paper Feed Rollers

• Use a lint‑free cloth lightly dampened with distilled water.
• Wipe the rollers in the input tray and rear access.
• Rotate them manually to clean the full surface.
• Let dry completely before reloading paper.

Take care and have an amazing day!

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Regards

Pallipurath.