RAM 1500 2021 — technical service bulletin
Bulletin 1400521 · NHTSA communication 10221675 · issued Jul 17, 2021
Technical service bulletin
communication type
Exterior Lighting
component
2021
model years
1
vehicle entries
Official summary
Fuel Line Blockage This bulletin involves replacing the engine fuel/EVAP forward line bundle. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Code (DTC) has been set: P0174 - Fuel System 2/1 Lean. In addition, the customer may notice one or more of the following conditions:Reduced acceleration. Rough starting.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.