P225C on the 2021 Mack Terrapro
The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.
Nobody has written a description of this code yet.
| KC-2050 | 2023-06-05. Service bulletin. CBR: Diagnostic Trouble Code (DTC) P225C00 : NOx1 Sensor Stuck High - US17+OBD2019 And Newer Emissions |
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1 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.