Did the radio display show " CODE " then " - - - - " immediately before you entered the code?
The CANCHECK message can show because the CAN (Control Area Network) wires haven't been connected to the radio, or because a radio from a CAN equipped car has been fitted into a car without CAN.
The CANCHECK message can show because the CAN (Control Area Network) wires haven't been connected to the radio, or because a radio from a CAN equipped car has been fitted into a car without CAN.