RAM Promaster 2018–2020 — technical service bulletin
Bulletin 9003591 · NHTSA communication 10173273 · issued Feb 12, 2020
Technical service bulletin
communication type
Electrical System
component
2018–2020
model years
3
vehicle entries
Official summary
DETECTOR, Evaporative System Integrity Module (ESIM) Before replacing this part, please call FCA Redacted Content. For Mexican Dealers, please call FCA Redacted Content. If no response in 15 minutes, proceed with repair.
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.