What should I do if Canon camera shows lens error?

1, SLR, poor connection between lens and camera, rotate lens. 2, lens error, that is, the lens is out of order, your camera may fall over, squeeze through, or sand into the lens and cause it to get stuck. 3. Another reason is that mechanical failure such as motor, gear, rack and other quality problems cause jamming. 4. Try to shake the camera lens downward, and the general fault can be eliminated. 5. If it doesn't work, go to a special camera for maintenance.