What is the E4 error code on a power pressure cooker XL?

E4 error code on a power pressure cooker XL indicates a problem with the pressure sensor.

Here are a few things you can try to fix the issue:

- Check the pressure release valve to make sure it is clean and free of debris.

- Make sure the lid is properly closed and locked in place.

- Unplug the pressure cooker and plug it back in.

- If the E4 error code persists, contact customer service for assistance.