But if you are a trained professional or have performed this procedure before, you can clean the Wii U Lens with your microfiber cloth by taking apart your disk reader.
After performing this procedure, turn on your Wii U and play any of the game disks. If the problem is not solved or this step wasn’t applicable in your case, move on to step 3.
Fix 3: Switch Between Wii and Wii U Modes
This scenario occurs when your Wii U Console shows Error Code 150 2031 in the case of all Wii games. Generally, when you insert a Wii game into your Wii U, it automatically launches Wii mode. But it seems, in this case, you are going to have to switch modes manually. To Switch your Wii U to Wii mode, follow these steps-
Step 1: Using your Wii U Remote, hover on the Wii Botton on the bottom left corner of the screen > press A to open Wii U Options Menu.

Step 2: Now Set the mode as Wii mode from the give list of options.
Step 3: After doing this, insert your Wii disk to see if the problem is resolved. If not, then follow Step 4.
Fix 4: Check for System Updates
If your system is not up to date with the latest firmware that comes with your regular System Updates, some of your games will cause Error Code: 150 2031. This situation can be overcome by simply updating your Console and restarting it. Follow these steps to bring your system is up to date-
Step 1: Hover over System Settings on the Wii U Menu using Wii U Remote and > then press A.
Step 2: Scroll forward and find System Update > then press A.
Step 3: Then Press A on Update to begin the update.

Step 4: If a message is received that your system is already up to date> press OK and you don’t need to update, move on to Step 5.

Step 5: If it shows a version, you can install, follow the procedure, and update your system. Once it shows that your system is up to date> then press Ok.
Step 6: Restart your Console and fire up the game. If the error is still not resolved, follow step 5.
Fix 5: System Reboot
If your issue is still not resolved, this is the last thing that you can do by yourselves on your console. Follow this step only if you’ve tried all the methods above, and non have worked.
Note
Remember to remove your game disk before Rebooting your system, or it might lead to other unwanted errors.
Step 1: Press Eject Button once to remove the disk.
Step 2: Press and hold on the Power Button until your Console turns off, and the light turns to red > now disconnect the Wii U AC Adapter.

Step 3: Wait for a few minutes, then connect it back > Press the POWER Button and turn it on.
Step 4: Insert your game disk back in and see if the error is resolved.
Conclusion
By now, your error should be resolved. If not, then you are going to have to contact Wii U Customer Care. But before that, you should check if you Wii U console and the game that you’re trying to launch is of the same region. You can do this by checking the regional code on your Game Disk and that of your Console.
If you don’t know already know the regional code of your Wii U Console, then you can easily check that by opening System Settings > checking the System Version in the top right corner. E stands for EU, U for US, and J is for Japanese.