RAM 2500 2019–2020 — technical service bulletin

Bulletin S2008000186 · NHTSA communication 10184726 · issued Nov 20, 2020

Technical service bulletin

communication type

Engine and Engine Cooling

component

2019–2020

model years

vehicle entries

Official summary

Engine Control Module (ECM) Flash Failure, Diagnostic Trouble Code (DTC) U1601 ? ECU Application Software Code 1 Missing Or Corrupted

Vehicles covered

2019 RAM 2500
2020 RAM 2500
2019 RAM 3500
2020 RAM 3500
2019 RAM 4500
2020 RAM 4500

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.