HP error code
49.xFirmware / communication error
✅ You can try a fix
What it means
A 49.x code means the printer’s firmware hit a critical error, very often caused by a corrupt print job or a network problem.
Common causes
- Corrupt print job stuck in the queue
- Network or driver problem
- Outdated firmware
What you can safely try
- 1Switch the machine off, wait 30 seconds and switch it on again — note whether the code comes back.
- 2If it happened while printing, cancel the job on the computer and resend it — one corrupt file can cause a controller error.
- 3Unplug the network cable and switch the machine off and on; if the code clears, the problem is a print job or the network.
- 4Take a photo of the display and note the machine model and its meter reading before you call.
⚠️ If the code comes back after a restart, stop using the machine and call an engineer — running it on can damage more parts.
The exact meaning can vary slightly between models. Send us the model number for a precise diagnosis.