MP140 can't recognise the black cartridge that

Error code 4 normally indicates that there is no unk, and the solution is by installing a genuine cartridge, Try to use Black PG40 remanufactured Canon printer ink cartridge. This cartridge is a high capacity cartridge which has been filled with 23ml of ink compared with the 16ml (Black) that you get with the originals. Compatible with: Canon Pixma MP140. if this error still occur it is better that you try the following procedure below:-

When you insert a refilled ink cartridge into your Pixma MP140 printer you should get a warning about the refilled cartridge. You should also be prompted, asking if you wish to disable ink level detecting. Agree to do so, and you won’t get the warnings again because the ink levels won’t be monitored by the printer.

Thanks