RAM 3500 2019 — technical service bulletin
Bulletin 1801121 · NHTSA communication 10220601 · issued Feb 5, 2021
Technical service bulletin
communication type
Service Brakes
component
2019
model years
3
vehicle entries
Official summary
Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Engine Control Module/Powertrain Control Module (ECM/PCM) with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one or more of the following DTCs have been set:P20E8-00 - Reductant Pressure Too Low. P0301-00 - Cylinder 1 Misfire(Sym Cam only). P0302-00 - Cylinder 2 Misfire(Sym Cam only). P0303-00 - Cylinder 3 Misfire(Sym Cam only). P0304-00 - Cylinder 4 Misfire(Sym Cam only). P0305-00 - Cylinder 5
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.