RAM Promaster 2014–2016 — technical service bulletin
Bulletin S2525000001 · NHTSA communication 11017399 · issued Apr 28, 2025
Technical service bulletin
communication type
Unknown OR Other
component
2014–2016
model years
3
vehicle entries
Official summary
Malfunction Indicator Lamp (MIL) Illuminated. Diagnostic Trouble Codes (DTCs) P22A1 – NOx Sensor Circuit High, Bank 1 Sensor 2, and P20EE – NOx Catalyst Efficiency Below Threshold, Setting.
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.