Error messages: U150 + Ink tank errors have occured

Use a chipresetter. This fixed my U150 problem :-)

I have the same messages and have never used anything other than Canon cartridges. Plus the cartridge had just been replaced when the messages started. So unless their cartridge is faulty their answer is balderdash & piffle.

Same problem, found two solutions, one temporary and one permanent.

Temporary - Open the top case, the ink tank giving the error will not be lit. Remoe and re-insert it. Close the printer. Usually takes one try, sometimes multiple, but doing so will make the printer recognize the ink tank.

Permanent - You'll love this one, it's a trick that cost Sony millions in the mid 90s, and eventually forced them to refine their product. Simply head to Wal-Mart, and buy a new ink-tank to replace your defective one.

Now, place the defective one in the box, and take THAT back for a full refund. Explain how it's defective (printer won't recognize), and they send it back to Canon for a refund. This hurts Canon's bottom line, and if enough people do it, they'll put more effort into their ink tanks.

Looking for people in california who have the canon printer problems.  I'd like to file a class action.  Contact me.  thanks,  peter

same problem MP600 yellow ink
why does it also prevent printing B/W or scanning? Ass design:-(

An on-line problem solver answered this question for me as follows, and it worked beautifully. I had previously tried just removing the ink cartridges, and then re inserting them, but that did not work.

"This is a somewhat common problem with the metal contacts that connect to the ink cartridge. Sometimes it can be fixed by cleaning the contacts, but other times it requires getting a new ink holder from Canon customer service.
To clean the contacts, you'll need a Q-tip and some isopropyl alcohol (it's important that it is isopropyl and not another kind of alcohol). Pull out the ink cartridges and clean the contacts on each one with the Q-tip dipped in alcohol. In particular, you want to make sure there are no fingerprints on the contacts. Then, turn off your printer and do the same with the contacts in the ink holder in the printer. Once the alcohol has dried on both sides, reinstall the cartridges and give it a try.
If this doesn't work, I recommend calling Canon tech support, so they can send you a replacement part."

According to Canon's instruction manual, you must complete the cleaning in less than 10 minutes. It took me about five. I did exactly the tech suggested, and after turning everything off and waiting a minute or so, I restarted everything, and the problem was solved.
You must be careful though, because if you leave a Canon Pi6600 cartridge out of the printer for more than 10 minutes, not only will the cartridge tray move back to the "off" position (out of reach), but the ink cartridges nossles will dry out and possibly not work. Also, do not "squeeze" the ink cartridges or you will get ink on yourself.

Same probs. as above. After replacing the cyan with a new cartridge (other one was still full by the way) the printer worked immediately. It will be interesting to see how long this lasts! I believe it is to do with the chip and that it has a certain life and goes dead after so many uses even if the ink tank is still full. Thus you have to buy a new cartridge.

Canon suggested I send the old cartridge back and they will replace it however I'm pretty sure I will continue to have the same problems as it happened with the other colours too even though they weren't empty. I'm in the process of trying to get another printer or my money back. Or even a few supplies of ink would do. I'll keep working on it and let you know the outcome. I probably won't buy a Canon again unless they provide some good customer care and improve their product.

If you're having this problem using genuine Canon cartridges and your cartridge is not empty or low, just call Canon! They agreed without hesitation to send me out a replacement Cyan cartridge.
Their support number is on this page: http://www.usa.canon.com/consumer/controller?act=PgComSmModDisplayAct&keycode=2110&fcategoryid=238&modelid=13589

Canon is one of the best companies to buy from and they have always taken care of any problems I've had.
No manufacturer will *support* the use of third-party inks. You are on your own when you have trouble with these third party cartridges themselves. Everybody knows that when they buy third-party products.

the non -Canon replacement cartridges usually come with some gooey adhesive material for
attaching the chip from the used cartridge to that of the new. If you only use 1 layer of the
plaster, the chip migh sit too low on the new non-Canon cartridge to be read by the printer.
Apply more adhesive, and try again.

Same problem here <3 These printers are definately fucked. I'm on the third yellow cartridge 100% full, new, £20 and it gives me this error. Better get our money back.