IF the problem was in the branch circuits neutral / ground you would not see 40 volts between the frame and the burner.
IF the problem was in the branch circuits neutral / ground you might find 40 volts between the frame and a 'good' ground or 40 volts between the burner and a good ground.
However the fact that there is 40 volts between a burner and the ranges frame suggest the problem is internal to the range and likely the burner itself.
