Canon MegaZoom 105 errors out when I turn it on 2E or 3E.

The 3E error code to indicate a drive motor tach fault.

Here's a good website that discusses how to troubleshoot and possibly repair. (Could be as simple as unplugging the machine for a few minutes).
How To Fix 3E Error Code On Samsung Washing Machine

Here's an EXCELLENT YouTube video on removing the motor and replacing the brushes (if equipped).
Samsung Washing Machine 3E Error Code not spinning or turning

CANON IR 105 ERROR CODE E000086-0000

Their is a small button on the bottom you push in then rewwind the film to take it out.

The "3E" error code indicates that a high current is detected.
A "3E" error in a Samsung washer indicates that there is an issue with the motor. Restarting the cycle may clear the error, but a service technician should be consulted if the error code appears again.

just replaced an oil pump, still faluring when engine hot.

something has malfunctioned in the lens motor itself, unfortunately this means that your going to have to take the camera into a repair shop or send it back to canon for repair.

Hi,

Checkout this tip about digital camera error messages


Lens Errorfix for Digital Camera

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what does a flashing E mean? also the film whines on after one shot wasting all the film? any help plz

go into service mode -function-clear-error- take machine off -un plug from wall -reconnect- turn machine