Got error code C-2454

[worm]

my C5501 got a error code c-2454 what is it

[ni311]

Code:
C-2454
Causes:
When the developing motor/K (M23) is ON, the maximum detection value of TCR sensor/K (TCRS/K) is the specified value and the difference between the maximum detection value and the minimum detection value is over the specified value.
Estimated abnormal parts:
Printer control board (PRCB)
Developing motor/K (M23)
TCR sensor/K (TCRS/K)

Did you try to restart the machine? Is the connector on the front of the developing unit connected to the wire?

[Socialist]

Check toner concentration in K dev unit. They may be too low.

[ni311]

How do you check toner concentration on C6501?