54plate astra 1.9 cdti help needed

[albyrfc]

Hi all looking for some help been searching the forum for answers had a pal set up cruise control and anti theft with opcom now he has nackerd the setting for my fuel range and when tank is full the needle doesn't show a full tank he will give me his opcom if anybody can let me know how to fix and what code settings I should use thanks to anybody who can help

[pecky]

Without knowing what your mate has done, it's hard to know if it is opcom causing the problem or operator error.

I suspect he has changed the fuel tank sensor type or code index.