RAM 3500 2020 — technical service bulletin
Bulletin 1805522 · NHTSA communication 10223191 · issued Mar 18, 2022
Technical service bulletin
communication type
Electrical System
component
2020
model years
3
vehicle entries
Official summary
Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Engine Control Module (ECM) / PowertrainControl Module (PCM) with the latest available software. Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that one or moreof the following Diagnostic Trouble Codes (DTCs) have been set: P0506-00-Idle Control System Rpm - Lower Than Expected. P0088 - Fuel Rail Pressure Too High - Bank 1(Sym Cam Only) P0607-00 - ECU Internal Performance. P20E8-00 - Reductant Pressure Too Low. P0301-00 - Cylinder 1 Misfire(Sym Cam Pump Onl
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.