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Info contained may also be helpful for those retrofitting a 50 in:
SUBJECT: 50 Gallon Fuel Tank Reconfiguration OVERVIEW: This bulletin involves inspecting the Powertrain Control Module (PCM) configuration data and performing the enable 50 gallon tank routine in wiTECH. MODELS: 2020 (DJ) RAM 2500 Pickup 2020 (D2) RAM 3500 Pickup NOTE: This bulletin applies to vehicles within the following markets/countries: North America. NOTE: This bulletin applies to vehicles built on or before June 11, 2020 (MDH 0611XX) equipped with a 6.7L I6 Cummins Turbo Diesel Engine (Sales Code ETL), or a 6.7L I6 Cummins HO Turbo Diesel Eng (Sales Code ETM) and a 50 Gallon Fuel Tank (Sales Code NFC). SYMPTOM/CONDITION: Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that the following Diagnostic Trouble Code (DTC) has been set: • P0461 - Fuel Level Sensor 1 Performance (Set in the Powertrain Control Module (PCM)).
5. If the fuel tank configuration is found to be correct, or DTC P0461 returns after correcting the option, review the following with the customer before replacing any parts: • It’s possible that the customer’s fueling habits could set this DTC. • If a customer allows the fuel tank level to fall below 14.9% and only adds small amounts of fuel to the tank keeping the fuel level below 14.9% during the 386 km (240 mi) counter, the DTC can set. • This is a normal characteristic of the fuel system and not a malfunction with the design of the system.