I have kyocera taskalfa 1800 and its displaying add toner how do i correct that error

SOURCE: km-1510 .. AP error code

AP = Adding Powder (toner) it's not an error
it's adding toner from the container into the developer unit while displaying AP. when there is enough toner in the container the AP will disappear and copies can be made when there is not enough toner in the container the toner empty light will come on.

SOURCE: 540 : y toner sensor error

Hi moneybaggz52:
Here is your problem.
Symptom:
When setting up a brand new C5100n or C5300n out of box, a toner sensor error is encountered.

The printer can display any one of the following errors:

543K: TONER SENSOR ERROR

540Y: TONER SENSOR ERROR

541M: TONER SENSOR ERROR

542C: TONER SENSOR ERROR
Cause:
This generally can be caused by two things.

1. The toner cartridge lock lever is not in the correct position.

2. The Transfer Belt lock levers are not in the correct position.
Resolution:

Check the appropriate toner cartridge lock lever (Shown below) and make sure that it is in the correct position.

CORRECT POSTITION INCORRECT POSITION


Check both transfer belt lock levers (Shown below) to ensure that they are in the correct position.

CORRECT POSITION


INCORRECT POSITION
Hopes this helps

SOURCE: my kyocera km 1500, it says

E33 means the copier is out of toner. Try tuning off and let it cycle a few times, if you ran it completely out some times it takes a few cycles to get running again.

SOURCE: my kyocera taskalfa 180 showing

C6400 is a fixing unit error.

To reset -

Try this, enter "10871087" from keypad, You should now be in maintenance mode.
Enter "163"press "Start / Print" key.

You should see a screen that says "Execute".

Cursor / highlight "Execute".

Press "Start / Print key.

The machine will turn off and should come back to ready. If not then you need to replace the fixing unit.

I hope this is helpful,
Shawn

SOURCE: Free service manual with code

To reset -

Try this, enter "10871087" from keypad, You should now be in maintenance mode.
Enter "163"press "Start / Print" key.

You should see a screen that says "Execute".

Cursor / highlight "Execute".

Press "Start / Print key.

The machine will turn off and should come back to ready. If not then you need to replace the fixing unit.

I hope this is helpful,
C-TECH INFOWAYS