The **E2 error code** on HP printers typically indicates a communication issue between the printer and the connected system, often related to paper size mismatch or poor connection. Here are some steps to resolve the E2 error:

## Causes of E2 Error
– **Paper Size Mismatch**: The printer is set to print on a different paper size than what is loaded. This is common when attempting to print a document on paper that is not suitable for the document’s size[1][3].
– **Communication Issues**: There might be a problem with how the printer communicates with your computer, or the sensor at the back of some printers can trigger this error if it is faulty[2][3].

## Solutions
1. **Cancel Print Job**:
– Press the Cancel button on the printer to clear any pending jobs[4].

2. **Adjust Paper Settings**:
– Ensure that the paper size selected in the print settings matches the paper loaded in the printer[1][4].

3. **Check Printer Connections**:
– Verify that all connections are secure and stable.

4. **Reset Printer**:
– Turn off the printer, unplug it, wait for 60 seconds, plug it back in, and turn it on again. This can resolve minor connectivity issues[4].

5. **Update Firmware**:
– Check for firmware updates, as outdated firmware might cause communication errors[4].

6. **Inspect Paper Sensors**:
– If applicable, inspect the paper sensors at the back of the printer to ensure they are functioning correctly. Faulty sensors might require replacement[2].