Recently our CJV30-160 started giving me this error and all but the magenta cartridges became undetectable. In order to work around this I would have to take out and reinsert each cartridge. Another odd thing is when this started happening I noticed the ink levels displayed on the printer are not accurate. For instance I have a full cartridge of black ink inserted and the display reads it as "1" (almost empty) when it should read "9" (full). I don't know if the two are related but my guess they are.