Fuel gauge on crack?

[muzzz89]

Jumped in the car this morning and on the way to realized my fuel gauge was reading full....problem is it was at 3/4 when I parked it last night?? I park on a level surface so that rules that out.
I top it up every week so there's no way I'll ever run out but still bugs me a little. Any idea whats going on??

[m1lky]

Start the car holding mode and set. Then press mode til you get to the test one. Your speedo will go to 100k etc etc. Check fuel gauge goes to half.

It will also give you fuel sender resistance and voltage but not sure what that should read by pressing mode to scroll through.