My gas guage on my 1997 Buick LeSabre is innaccurate and reads full most of the time. Everything else on the dash works fine. Any ideas?
Innacurate fuel guage 1997 Buick LeSabre on 1997 Buick LeSabre
Defalt gauge reading IS full, even if you unplug the sending unit. Open circuit, at one point, in the fuel level sensor attached to the fuel pump module is 'most likely' the problem.
2 more answers , 2 more comments
usually when fuel gauge sending unit not working you need to replace the whole fuel pump assembly they are together.
Is it reading full or is it reading past full? It may be a faulty gauge sending unit but in general, when a fuel guage signal wire shorts to ground, the gauge needle will read past full or 'pegged'. Do you have a lot of miles on the car?
70,000 original miles, will have to see if it is pegged or not, think it just reads full until the car is empty then it reads less than full but never reads empty.
In that case the sending unit is probably faulty. The sending unit can be replaced separately but at 70,000 miles I would recommend replacing the entire pump and sending unit assembly.