U0121 on the 1984 Volvo B10M
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-2119 | 2022-07-05. Service bulletin. DTC U012100 - Lost Communication With Anti-Lock Brake System (ABS) Control Module, No Additional Information |
|---|
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.