OKI Printer Stuck in an Error State: What to Check and How to Clear It

"Printer in error state" is Windows talking, not your OKI. Windows is saying it can see the printer, but the printer has reported a problem, or has stopped answering status requests the way Windows expects. Windows doesn't pass along what the problem is, so the message is close to useless on its own.

Your OKI usually knows exactly what's wrong. Most OKI LED printers and MFPs show a message and a three-digit code for every fault they detect, whether that's a jam behind the front cover, a toner cartridge whose lock lever isn't turned all the way, or a tray with the wrong paper size. So the fastest route is almost always: read the printer, fix what it tells you, then clean up whatever Windows is stuck on.

This guide follows that order. The printer checks come first, then the Windows fixes for Windows 11 and Windows 10, from quickest to most involved.

A quick note: Printer Tales is an independent troubleshooting resource and isn't affiliated with OKI. OKI stopped selling printers in North, Central, and South America in March 2021, but it still supports printers that are already in use, with drivers, manuals, parts, and supplies.

Why Windows Says Your OKI Printer Is in an Error State

It almost always comes down to one of these:

• The printer has stopped itself. A paper jam, an open cover, an empty tray, empty toner, a drum or fuser at the end of its life, or a part that isn't seated properly will all halt an OKI until the problem is cleared.
• A setting doesn't match. The paper in the tray isn't the size or type the print job asked for, so the printer waits for you instead of printing.
• A job got stuck. One damaged or oversized job can block the queue, and Windows flags the whole printer rather than the single document.
• The Print Spooler has stalled. This Windows service hands jobs to the printer. When it hangs, printers commonly show "Error" or "Offline."
• The driver is wrong or damaged. A generic driver, a driver for a different OKI model, or a driver that broke during a Windows update can't read the printer's status correctly.
• The connection is unreliable. A USB hub, a worn cable, a changed IP address, or an IP address that another device is also using can all interrupt status messages.

Step 1: Read What Your OKI Is Telling You

Walk over to the printer before you touch the computer.

Check the ATTENTION light. In OKI's manual for the C824, C834, and C844, a steady ATTENTION light goes with warnings you can usually print through, like Toner Low or Image Drum Near Life. A blinking light goes with errors that stop printing. If it's blinking, the printer is waiting for you, and that's almost certainly why Windows shows an error state.

Read the message and note the number. Write down the three-digit code if there is one. It tells you where to look.

Press HELP if you have it. If the bottom of the screen says "Please see HELP for details," press the HELP button. On models that have it, the printer shows the error code and walks you through the fix on screen, often with pictures.

What Common OKI Error Codes Mean

The numbers below come from OKI's own error tables for the C824/C834/C844 color printers and the MB562 mono MFP. Most OKI LED models use the same number ranges, but the exact code for a given tray or color can differ, so treat this as a guide and check your model's manual if something doesn't match.

For a longer list, see our guide to OKI printer error codes and messages.

Step 2: Clear the Problem at the Printer

Find your message below. Once it's cleared, the display should go back to Ready To Print (or ONLINE on some models), and the ATTENTION light should go out.

Paper Jams (370s, 380s, 390s)

1. Open the cover the code points to. For 380 to 389, that's the top or front cover. For 390 to 395, pull out the tray named on the screen.
2. Pull jammed paper out slowly, in the direction it normally travels. Torn scraps left behind will trigger the same code again.
3. Be careful around the fuser at the back. It gets hot enough to burn, so give it a few minutes to cool.
4. On MFPs like the MB562, OKI says to open the scanner unit first, then the top cover.
5. Close everything firmly.

If a tray jam code (391 to 395) comes back with no paper stuck anywhere, OKI suggests loading fewer sheets and checking that the paper guides and stopper are snug against the stack.

An Open Cover or a Loose Part (310, 311, 320 to 348, 360)

Open the cover, then close it again with a firm push until it clicks. For a drum, fuser, belt, or duplex unit message, take the named part out and put it back in. If the fuser still reports an error after you reseat it, OKI says it may need replacing.

Toner Errors (410 to 413, 540 to 547)

• Toner empty (410 to 413): replace the cartridge for the color shown. OKI notes you can open and close the front cover to squeeze out a few more pages, but it warns this can damage the image drum, which costs a lot more than toner.
• Toner sensor or lock errors (540 to 547): this usually happens right after a cartridge change. Turn the blue lock lever on the cartridge all the way until it lines up with the mark at the far end. Check that the white protective tape has been removed from a new cartridge. On the C800 series, if the error is on cyan, OKI also says to check that the two blue knobs on the belt unit are locked.

Drum, Fuser, or Belt at End of Life (350s, 560s, 680s)

The part has reached its rated life, and the fix is a replacement. On some models, pressing ONLINE or opening and closing the front cover lets you keep printing for a while. When the message says printing is disabled (680 to 683 on the C800 series), the printer won't print until the drum is replaced.

Paper Doesn't Match the Job (400, 461 to 465, 660 to 665)

The printer is waiting because the job asked for one paper size or type and the tray holds another. Either load the right paper, or change the setting so they agree: in your application's print settings and in the tray setting on the printer. On printers with a paper size dial inside the cassette, make sure the dial matches the paper you loaded.

"Data Present"

Part of a job is sitting in the printer's memory. Press ONLINE to print it, or CANCEL to throw it away.

Memory Overflow (420)

The job is too complex for the printer's memory. This is common with large PDFs, scans, and heavy graphics. Print fewer pages at a time, or lower the print quality or resolution in the printer driver.

Non-Genuine Consumable (709)

The printer has found a toner cartridge or drum it doesn't recognize as an OKI original. You can go back to a genuine OKI cartridge, or accept the risk and override it:

1. Turn the printer off.
2. Turn it back on, and press and hold CANCEL when PLEASE WAIT appears.
3. Let go of CANCEL when Ready To Print appears.

OKI says the printer records this override. It also says any repair needed because of a non-OKI consumable may not be covered by the warranty.

Step 3: Restart the Printer and Print a Test Page From It

1. Turn the OKI off with its power switch and leave it off for about 30 seconds.
2. Turn it back on and wait until the display says Ready To Print. OKI printers take a little while to warm up after a restart.
3. Print a configuration page (OKI calls it the menu map) straight from the printer:
   • On models with an Fn key: press Fn, then 1, 0, 0, and OK. Check that Configuration is showing with Execute selected, then press OK.
   • On other models, look in the printer's menu under Print Information, then choose Configuration. The wording varies a little by model.

If the menu map prints, the printer is healthy and the problem is between the OKI and your computer. Keep going with Step 4.

If it doesn't print, or an error comes straight back, the problem is still at the printer. Go back to the code on the display, or jump to “When It's a Hardware Fault.”

Step 4: Clear the Error and Stuck Jobs in Windows

Even after the printer is fixed, Windows can hang onto the error until you clear it.

1. Open Control Panel, then click View devices and printers. (In Windows 11, the quickest way is to type "Control Panel" into the Start menu search.)
2. Right-click your OKI printer and choose See what's printing.
3. Open the Printer menu. If Use Printer Offline or Pause Printing has a checkmark next to it, click it to remove the checkmark.
4. Still in the Printer menu, choose Cancel All Documents, then confirm.
5. Send one test page.

While you're here, make sure Windows is sending jobs to the right printer. If you've installed your OKI more than once, you may see two copies, such as "OKI C332" and "OKI C332 (Copy 1)." Delete the one you don't use. Then right-click the one you keep and choose Set as default printer. On Windows 10, turn off Let Windows manage my default printer in Settings > Devices > Printers & scanners first, or Windows may switch the default back on its own.

If jobs refuse to leave the queue, see our guide to an OKI printer job stuck in the queue.

Step 5: Reset the Print Spooler

If the error comes back as soon as you print, the Print Spooler may be holding a damaged job that the queue window can't see.

1. Press Windows + R, type services.msc, and press Enter.
2. Scroll to Print Spooler, double-click it, and click Stop. Leave this window open.
3. Open File Explorer, paste %WINDIR%\System32\spool\PRINTERS into the address bar, and press Enter. Click Continue if Windows asks for permission.
4. Delete everything inside the PRINTERS folder. Delete only what's inside it, not the folder itself.
5. Go back to the Print Spooler window, click Start, and make sure Startup type is set to Automatic. Click OK.
6. Print a test page.

Step 6: Check the Connection

Connected by USB?

• Plug the printer straight into the computer. OKI's manuals say its printers don't support USB hubs, and switches, buffers, and extension cables can cause trouble too.
• Use a USB 2.0 cable. OKI's manuals call for USB 2.0, and at least some models don't support USB 3.0 cables.
• Try a different cable if yours is old or has been pinched behind a desk.
• If you've recently moved the cable to a different USB port on your computer, Windows may be sending jobs to the old port. The fix for that is in our OKI printer offline guide.

Connected by network or Wi-Fi?

• Check the printer's display for "IPv4 Address is conflicted." That means another device on your network has the same IP address. Give the printer a different address, or have your router reserve one for it.
• Check for "Getting target IP failed. Please check DHCP settings." The printer couldn't get an address from your router. Restart the router, then restart the printer.
• Look at the port Windows is using. Right-click the printer, choose Printer properties, and open the Ports tab. If the checked port starts with WSD, OKI recommends switching to a Standard TCP/IP Port that uses the printer's IP address. OKI lists WSD as a cause of jobs that don't print completely, and its support team has confirmed that WSD printing can fail while the printer is asleep.
• If the display says "Receiving Data Timeout," the printer gave up waiting for the rest of a job. On the C800 series, OKI suggests setting a longer Timeout Injob under Menus > System Adjust. The factory default is 40 seconds.

For step-by-step instructions on switching ports, finding the IP address, and stopping an OKI from dropping off the network, see our OKI printer offline guide.

Step 7: Reinstall the Right OKI Driver

A driver problem is the likely cause when the error keeps coming back after a clean restart, when the printer prints pages of odd characters, or when the display says "Invalid Data" or "Received invalid data." OKI says that last one usually means the driver doesn't match the printer model.

1. Find your exact model number on the front or top of the printer, for example C332dn, B432dn, or MC363dn.
2. Download the current driver for that model and your version of Windows from OKI's official support site (oki.com/us for US customers). Don't use third-party driver download sites.
3. In Settings, go to Bluetooth & devices > Printers & scanners (Windows 11) or Devices > Printers & scanners (Windows 10). Select the OKI printer and click Remove.
4. Press Windows + R, type printui /s /t2, and press Enter. On the Drivers tab, select the OKI driver, click Remove, and choose Remove driver and driver package.
5. Restart the computer, then run the OKI installer. If you connect by USB, plug the cable in when the installer asks you to, not before.

Not sure whether to pick the PCL or PS driver, or seeing your printer listed as "OKI LTD" in Windows 11? Our OKI printer driver guide covers both.

Step 8: Run the Printer Troubleshooter and Check Windows Update

Run the troubleshooter. Microsoft has retired the old built-in troubleshooters, and printer troubleshooting now runs in the Get Help app. Open Get Help from the Start menu, type printer troubleshooter, and follow the prompts. It can restart the spooler and fix some port and driver settings on its own.

Check Windows Update. Go to Settings > Windows Update and install anything waiting, including optional driver updates, then restart.

Did the error start right after an update? Updates sometimes swap in a generic driver or reset a printer's port. Reinstalling the OKI driver (Step 7) fixes most of these. If it doesn't, our guide to fixing an OKI printer after a Windows update walks through rolling back the update.

When It's a Hardware Fault

Some messages can't be fixed from a computer. If your OKI shows "Power Off/On" or "Inspection is required" with a number, it has detected an internal fault.

1. Turn the printer off, wait a few minutes, and turn it back on.
2. If the same message comes back, write down the full code, including any numbers after a dash, like 231-05.
3. Contact your OKI dealer or service provider, and tell them the code and what the printer was doing when it appeared. OKI asks for both.

A few of these have a simple cause, so check them before you call:

• 126: Condensing Error. Moisture has formed inside the printer, which is common when a printer has come in from a cold truck or a cold room. Turn it off and leave it at room temperature before turning it back on. An OKI reseller's service reference suggests anywhere from two hours to half a day.
• 166-03. The inside of the printer is too hot. Clear anything blocking the vents, then restart it.
• 166-04. The inside of the printer is too cold. Warm the room, then restart it.
• 231-05 to 231-08. The printer couldn't read the chip on a toner cartridge or image drum. Reseat the part. If the error continues, OKI says to replace it.