It says that it's the wrong printer cartridge no matter what one we put in

Clean the toner near empty sensor

Try these 2 procedures:

1/
- Unplug the printer without turning it off.
- Press On for 1O seconds.
- Release the button and replug the printer.

2/

(Careful, this will erase the printer's memory, like printing queues etc.)
- Unplug the printer.
- Press simultaneously "#" and "6" and keep these buttons pressed.
- Replug the printer without releasing these buttons.
- The display will say " Stop " or something like this, then "semi full reset" . Release the buttons now.
- Start the printer now. It will ask you to set the language and the country. If it doesn't, repeat all steps.

if you ever get this figured out, let me know, my mp730 says the same thing, i had the head cleaned after i got a wrong cartridge error and now i have a put in cartridge error

Cartridges won't matter on this machine, that error says that the printhead is bad. You need
QY6-0049-000 around $50.00

I had the same problem with Magenta 8. Apparrently there is a chip in the cartridges that has an expiration date that prevents the printer from recognizing the cartridge after that date. I called Canon to find out where that date is located on the cartridge or packaging so when I buy them on sale as I did, I will be aware how long it's good for. They told me that there is no expiration date and the ink is good indifinitely. I told them what I heard about the chip and was promptly put on hold. When they got back on the phone, they told me they were sending me a new cartridge "as a courtesy." Sound fishy?

Your post is in the wrong place. I almost got you the wrong directions. LOL


Issue: How do I install the ink cartridge(s)?
Solution: Installing / removing ink cartridges MP160 / MP180 / MP460

Installing / Removing Ink Cartridges To print normally, install or remove ink cartridges in an orderly procedure. Installing ink cartridges:

1. After confirming that the printer is powered on, open the scanning unit (printer cover).The ink cartridge holder moves to the replacement position.
   
   Note: After confirming that the scanning unit support is fixed into position, release your hands.
   
   
   
   
   
2. Take out a new cartridge from its casing and gently remove the orange protective tape in the direction of the arrow.
   
   
   
   
   Note: - Do not attempt to reattach the protective tape once you have removed it.
   - Do not touch the gold electrical contacts or the print head nozzles after removing the protective tape.
   
   
   
   
3. Insert the ink cartridge into the ink cartridge holder.- Black: the left slot- Color: the right slot*
   
   *One black cartridge and one color cartridge must be installed in the machine in order for the printer to operate. It does not matter if the capacities (Standard or High) do not match.
   
   
4. Push up on the front of the cartridge until it locks into place. (A click sound will be heard when the cartridge is locked in place.)
   
   
   
   
5. Confirm that the ink cartridges are installed properly.
   
   
   
   
   <1> The ink cartridge is not installed properly.
   
   <2> The ink cartridge is installed properly.
   
   
6. Fold the scanning unit support and close the scanning unit (printer cover).
   
   
7. Wait until the preparatory operation is complete; it takes about one to two minutes.
   

Removing Ink Cartridges:

1. After confirming that the printer is powered on, open the scanning unit (printer cover). The ink cartridge holder moves to the replacement position.
   
   
   
   
2. Press down on the semi-circular tab to release the cartridge and then remove it.
   
   
   Note: Handle the ink cartridges carefully to avoid staining clothes and surrounding work area.
   
   
   
   
   
3. Remove and replace each cartridge individually. Or, remove the second cartridge after the first has been removed.
   
   
4. Fold the scanning unit support and close the scanning unit (printer cover).

Issue: ERROR LCD: PUT IN CARTRIDGE
Solution: Press ON/OFF switch to reset the multifunction device

Reset the device when it is not functioning properly. If the device is not functioning properly or to clear memory, reset it.

1. On the operator panel, press and hold the <ON/OFF> button for one second. (The display will go blank.)
   
   
2. Wait approximately ten seconds and then press the <ON/OFF> button again.
   
   
3. Wait until the device has completed its cycling process before submitting another job request.

I'm not familiar with your particular model... but have you made sure the electrical contacts on both the printer and cartridge are clean (assuming there are such)? Sometimes these contacts get dirty or covered with ink. Try using a cotton swab dipped in rubbing alcohol or electrical contact cleaner (Chemtronics Tun-0-Wash or similiar). This may not be your problem, but it is worth a shot.

Well, Since the cartrigde has been working it could be just a matter of contact. Try removing the cartridge, and clean the contact surface on the cartridge with a alcoholic based cleaning liquid on a soft cloth. Tis might help solve the problem.