canon ir2870, ir4570,ir3540 error code e000024 August 4, 2019

It's concerning the toner level in the dev unitor drum unit. Try entering service mode and selecting 'install' this will stir toner and try to feed toner through. Could be a dirty or faulty toner level sensor. Cuuld also be the drum life over - check drum life in the service mode. Check my other posts to see how to enter service mode
Sir, canon ir2270 error code 24 but machine is starting from 100 page running and then error code 24 then clean the D. P unit then fill ink then 100apage running machine then error 24. I am changing 1 sensor and 1 cable, then same problem. How to solution?.