Firefly TruTank error code Status: Initializing
TruTank diagnostic menu shows Initializing. Per Forest River TSB 225-1396: add water to the tank - it should switch to Valid. (The Firefly guide: the screen shows no value without at least 5 cm of liquid over the sensor.)
What to check, and in what order, is in the app. The flow Firefly TruTank - tank not reading, invalid (blue line) or wrong level walks this code step by step with the pass/fail measurements, wiring schematics and procedures that go with it, and it works offline in the bay.
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- Forest River TSB 225-1396 - TruTank holding tank monitor (2021 Coachmen Nova Class B) remedy instructionsForest River, Inc. / Firefly Integrations (NHTSA archive)
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