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RecallGazette

Vehicle problems, recalls & safety intelligence

Freightliner Sprinter 1500 2019–2024technical service bulletin

Bulletin LI49.20-N-078838 · NHTSA communication 11016429 · issued Mar 18, 2025

Technical service bulletin
communication type
Fuel/propulsion System
component
2019–2024
model years
52
vehicle entries

Official summary

Check engine light or Adblue warning with fault codes P206B31, P203B31, or P300494 when outside temperatures are below 32 degrees Fahrenheit. SCR Gen4 (KP7) Complaint: The check engine light or AdBlue warning is activated, accompanied by one or more of the following fault codes rela- ted to the AdBlue tank: P206B31: Malfunction of the concentration sensor for AdBlue; the signal is absent. P203B31: Malfunction of the AdBlue fill level sensor; the signal is absent. P300494: The quality of the AdBlue is insufficient. Cause: A. The software for the AdBlue (SCR) control unit (N118/5) is outdated. B

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.