RAM 3500 2020 — technical service bulletin
Bulletin 1808922 · NHTSA communication 10228049 · issued Apr 28, 2022
Technical service bulletin
communication type
Power Train
component
2020
model years
1
vehicle entries
Official summary
Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the correct software. This vehiclemay have been programmed with incorrect software. The customer may experience Active Noise Control (ANC) system not working. Upon further investigation the technician may find the followingDTCs have been set: P1404 - EGR Position Sensor Rationality Closed. B154F-64 - Lost Crankshaft Pulse Signal-Signal Plausibility Failure B154F-24 - Lost Crankshaft Pulse Signal-Signal Stuck High. P1404 - EGR Position Sensor Rationality Closed DTC can be erroneously set when other
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.