For the past few fuel fill-ups I have noticed the mileage reading in all trip meters continually cycles between 0.0 and 4.9 mi when I initially reset the trips and fuel minder at fill-up. This "difference" continues to display, cycling from the true mileage to a value that is 4.9mi higher as the millage increases. Why and where is this phantom 4.9mi coming from and how can I get rid of it? Consequently the MPG reading within the trip meter cycles between values at the same time.