B1938 on the 2020 Alfa Romeo Stelvio
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.
This code is specific to a manufacturer and is not described here. Its meaning is in the manufacturer's service information.
| S2024000006 | 2022-09-26. Service bulletin. After Module Replacement A/C Systems Do Not Operate Properly. DTC B1938-64 Humidity Sensor LIN Bus ? Signal Plausibility Failure |
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| S2024000006 | 2020-09-28. Service bulletin. After Module Replacement A/C Systems Do Not Operate Properly. DTC B1938-64 Humidity Sensor LIN Bus ? Signal Plausibility Failure |
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.