I had the same problem with my Samsung CLX-3185 but I finally FOUND THE SOLUTION!!
Someone mentioned that it might have had to do with the receptors (the four golden pins) on the toner cartridge, and I thought that might have been the case since all four of my other cartridges were working just fine but the cyan one just kept coming back with that error message.
This is what I did. I simply took the cartridge out, used my shirt to clean the golden pin areas as well as my fingers. Gave it a good rub, and then shook it a little put and put it back in. Then it instantly started printing again and the error message was gone!
Side note: my toner cartridge was a refillable one, and not one from Samsung as well.
This worked wonders for me and finally resolved my problem!! It was that simple. Hope this helps everyone else :)