I'd like to add that we're experiencing the same issue. We have 4 in the office...3 are experiencing the same trouble, 1 is not. The one that isn't is using a regular capacity toner cartridge, the 3 that are have the high capacity cartridges. My theory is that it's not a coincidence.

Are you using the high capacity cartridges when you get the error, or am I going down the wrong path here?

Also having the same issue here. Seems like a trend with this model.

Just checked and yes we are using the High Capacity cartridge.

To be honest, I didn't pay attention to what cartridge it was. Just that it's a genuine Dell cartridge. Anyway, I just ended a chat session with a Dell tech and they sent me this link for a firmware update (via usb):

ftp://ftp.dell.com/Printer/DELL_2330D-2330DN-MONO-LASER_A03_R279651.exe

I have a strong feeling the HC cartridge has something to do with it. Can you post back if the firmware update worked for you?

Will do. But I'll report back around Friday since the error we get is intermittent. If we get the error again, we should get it by then. Also, I read the instructions for the firmware update more. The update can be installed using the printer's web interface and the firmware specifically addresses the cartridge 31.xx error.

Sorry for the delay. Still having the issue after installing the firmware :(

I am having the same error on a 2330dn.  We only use Dell toner, but we are also using the high yield cartridges.  Has anyone else found a solution yet?  We have to open and shut the front of the printer and the 31.xx error goes away until the next print job.

Hello again...I guess my first assumption was wrong. We ordered standard capacity cartridges and are still having the same issue.