P205B on the 2018 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-185 | 2022-04-05. Service bulletin. Mack Chassis - Diagnostic Trouble Code ( DTC ) P205B - US14+OBD15 Emissions, Common Model Year 2016 |
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| K20878118 | 2019-12-09. Service bulletin. Diagnostic Trouble Codes ( DTC ) P205B-64 - Reductant Tank Temperature Sensor Circuit Range/Performance - Model Year 2018 and Newer |
2 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.