Well but your description of the issue doesn’t fit observed behavior on mine. If I do what you describe, I’ll usually get above Full and close to 500 DTE. The point in my case is I shouldn’t have to do that much topping off, if at all.This is a good description of the issue, both what the fuel gauge is doing and the common experience dealing with Toyota service personnel. Today I thought of a way to describe the issue that avoids the term DTE. I’ve noticed that trying on here, or at the dealership, to argue that it is an issue that your display shows only 400 DTE after a fill up brings out the trolls and Toyota apologists. DTE or Cruising Range has been a reliable technology on any other vehicle I’ve owned for 20 years (albeit non-Toyotas), but I’ll accept for the sake of this forum that we can’t invoke DTE abnormalities as a symptom of problems. I thus propose this new way to describe the issue: “after a fill-up, defined as filling to first click with 3-4 additional top-offs, I see the fuel gauge at 7/8 and can get no more than 400 odometer miles until the low fuel light comes on again.” That, Toyota service guy, is an issue based on how your employer marketed this vehicle.