just put an diagnostic code reader on the my mk2 fiat punto active sport and it came up with code u1600 ive looked in the handbook but its not in there anyone know what it is

Google u1600 fault code

or use the forum search U1600 is the "key not recognised" code

https://www.fiatforum.com/punto/291...-ecu-compatibility-code-issues.html?p=2943769