EOS 5D Mark IV won’t allow me to change aperture

[CanonShooterDev]

Recently bought a used EOS 5D Mark IV off of the market & shortly noticed that it wouldn’t allow me to change the aperture (F16 was the only option shown). At first I thought it was a faulty lense, until i tried a brand new EF Canon lense and same thing occurred except this time it’s stuck on F22. I updated firmware, and reset all settings to default and nothing has worked for me so far. Starting to think it’s a problem with the Body itself. Any tips on what the issue is, and how to fix it?? How much in repairs am I looking at if needed?? 

[Waddizzle]

If you purchased a used camera, it is advisable to go through the entire menu system and reset everything you encounter with a reset option.  You want to begin using the camera with the camera settings in a known state. This might take ten minutes to complete. 

[MikeSowsun]

When this problem comes up, it is usually because the user has Multi Function Lock engaged. 

[CanonShooterDev]

I went through and reset everything also, same results, an aperture of F22 was the only option available after reset as well 

[MikeSowsun]

Did you check to see if the Multi Function Lock is off?  

Is the aperture stuck in all modes? Program, Aperture Priority, Tv Priority, Manual mode, etc? 

When you operate the Depth Of Field button, does the aperture stop down to f/22? 

[CanonShooterDev]

So I tried this also last night, it wasn’t the multi lock function either, only allowed me to be on an aperture of F22, every other function seems to work just fine 

[deebatman316]

Are you using any 3rd Party accessories attached to the camera if so remove them. There is a Custom Function on the camera to restrict the lens' aperture range. Did you reset the Custom Functions too. Resetting the camera to factory default DOES NOT clear Custom Functions. What lens are you using please provide the FULL NAME of the lenses in question. What aperture is set with the camera in Full Auto (A+ Mode). I have posted example lenses below to help identify your lens.

[Waddizzle]

What lens are you using?  What shooting mode are you using?

Have you tried a different lens?  Do you have the same issues with Green Automatic shooting mode?