RAM 3500 2019–2021 — technical service bulletin
Bulletin S2108000091 · NHTSA communication 10218496 · issued Aug 12, 2021
Technical service bulletin
communication type
Electrical System
component
2019–2021
model years
6
vehicle entries
Official summary
When The PTO Is Engaged, The Engine RPM Will Surge And Cannot Increase above 1100 RPM. Diagnostic Trouble Codes (DTCs) P061B ? Internal Control Module Torque Performance, And/Or P064B ? PTO Control Module, Set.
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.