Distance & Fuel Remaining Never Changes

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Trip Distance & Fuel Economy update
Instant & Avg Fuel Economy update

If you had similar struggles AND found a solution please share.  Chuck 2006 Seeya on a Freightliner chassis with a CAT C7 engine

See if the data is available on the J1708 data bus (App Settings page).

Also clear the Persistent Data and have the App calculate fuel level and fuel economy (App Settings page). See the Getting Started document's Persistent Data and Fuel and DEF sections.