Question about Canon Pixma MP500 All-In-One InkJet Printer

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Printer suddenly won't work

The U043 sign comes up. All of the ink tanks are totally seated in, but the light is not on.

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Re: Printer suddenly won't work

  • Replace a new Canon ink cartridge as it could be due to the unique features that Canon has build on their ink cartridge not done properly which resulted to be faulty. Report the issue to Canon if your existing ink cartridge is not from other 3rd party band, Canon should be able to do 1 to 1 exchange once confirmed that it is their ink cartridge problem. Cannon has build the unique feature to prevent users from misusing 3rd party ink cartridge on their printer.
  • Other times if by replacing new ink cartridge the problem for error code still occurs, it might be the pin on the print-head has lost the alighting, this will require for Canon to service to alight back the pin on print-head in order for the printer to operate smoothly again.
  • Or missing pin has dropped off from the print head, which causes the printer not able to read the ink cartridge, printer needs to be serviced.
  • (Maybe check with your own nearby technician if by any lucks they can help to rescue your printer, which I hope Canon does not have further enhancement on their printer with other Unique features to prevent users from using 3rd party technical support.)

Posted on Mar 28, 2008

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Hello the following message comes up when i have put some new ink in. U043 the following ink tank cannot be recognised. any ideas? i have tried 2 ink tanks and same message comes up.

This Canon ink tanks has a memory chip.Try clean this chip with piece of cotton and some alcohol.Clean the contacts on the print head too.Sometimes happen this chip going to fail and printer not recognize it respectively not recognized and ink cartridge.In worst case your print head may be defective.

Oct 29, 2009 | Canon MP610 Photo All-In-One Printer

1 Answer

I get the U043 error on my Magenta. Cartridge is set properly.

Ink tank not installed.
U043 (Applicable ink tank
The following ink tank
cannot be recognized.
Install the applicable ink tank(s) properly,
and confirm that the LED's of all the ink
tanks light red.

Sep 13, 2009 | Canon PIXMA MP600 all-In-One InkJet...

1 Answer

U043 error


With printer powered ON, remove the front paper tray and lift the scanner unit fully up, to expose the printheads.
Then open the inner cover, once the printhead/ink tank assemblage has stopped moving into position(... with caution, remembering that it is powered on. Don't touch metal anything, it could shock you - or be damaged sightly by being touched.)
Then, press down on each ink tank's top surface where it says PUSH, firmly. If any or all snap into place, then there's your fix!
Then check to be sure that all lights on the front face of the print tanks are lit, like the first 3 on the left.
<2> is improperly installed, so the light on the front is dark. <1> are OK, lights on.

How are the lights on yours?
If they're all ON, then that part's OK. If any are flashing or OFF, let me know... and try popping the ink tank(s) in question out and looking to make sure all tape has been removed/that nothing obscures the metal contacts [-don't touch them!] or etc.Hope i helped you.

Thanks for using ' Fixya ' and have a nice day!!

Sep 04, 2009 | Canon MX700 Office All-In-One InkJet...

1 Answer


The U043 error code indicates that an ink tank is not installed. One or more ink tank icons on the LCD should also be lit up. The lit up icon indicates the applicable ink tank. Verify these tanks are indeed fully seated in the print head and that they are lit up red.

You can also press the OK button to clear this message and continue.

May 19, 2009 | Canon PIXMA MP600 all-In-One InkJet...

2 Answers

MP500 ink tank cannot be recognized error U043

I had the same problem. My mp630 is also only 4 months old. I replaced all colour ink cartrdiges(inc black), but was only able to release the function for detecting the ink levels for magenta and cyan. Yellow and black then started giving error message U043, with them alternating between working, but never working at the same time. Getting them all clicked in with the lights glowing red does not solve the problem, as once the printer cover is closed, the same error message turns up. The only thing that worked for me is moving the chip slightly out of alignment, by pushing the sliding chip holder, and I only had to do this twice before they all started working and the printer was unlocked.

Jul 30, 2008 | Canon PIXMA MP600 all-In-One InkJet...

1 Answer

Error U043 - Ink Tank Cannot be recognized

Try to open and close the main cover a bit, ... ink recognition will start and may solve the probleme ...
... otherwise remove the cartridge and clean the chip contacts e.g. with spirit
Maybe also pressing the stop/reset-button for >10s will also help to continue printing, but in this case the fill level of the cartridge will no longer be shown

Apr 26, 2008 | Canon PIXMA MP830 All-In-One InkJet...

2 Answers

MP500 ink tank cannot be recognized error U043

Same problem - two solutions I found helped me work out mine. One said contacts needed to be cleaned and it worked to use a Q-tip and alcohol or just click it in position several times until it recognizes the cartridge - this may work. Another said that they got it to work by installing a brand new cartridge - cool, but I have one full of ink it won't recognize. So I pulled the little circuit board off a used cartridge (like you need to do with some refills) and put it on the cartridge that it wouldn't recogrnize - works great. Still haven't figured out how to get it to acknowledge ink levels though. Canon really should be more consumer friendly since these problems seem to be intended to compel the use of proprietary cartridges.

Dec 27, 2007 | Canon PIXMA MP600 all-In-One InkJet...

3 Answers

MP500 ink tank cannot be recognized error U043

I have a canon mp510 pixma same message U043 and a u150 fault.
I cant see any chip to replace and have replaced my original cartridges with a non branded cheaper type, this might be why. Does this make a difference or is this the same problem occurring with replacement canon cartridges as well.

Dont want to buy genuine ones if its not going to make any difference.

Anyone who can help me would be appreciated

Nov 14, 2007 | Printers & Copiers

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