P0420 on the 2024 Audi Q3
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.
| AVin4Pin20240404 | 2024-05-07. Service bulletin. Noise from front door trim panel while driving Air suspension warning - DTC P089200 charge handle doesn't release vehicle will not charge Corrosion on wheelhouse cover plate P008700 - low fuel pressure P042000: Catalyst System,Bank1 Efficiency Below U060B00 - no com to G31 boost pressure sensor Airbag light on, DTCs B101704, B103604 Wind noise from front doors at highway speeds |
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| AVin4Pin20240403 | 2024-05-07. Service bulletin. Noise from front door trim panel while driving Air suspension warning - DTC P089200 charge handle doesn't release vehicle will not charge Corrosion on wheelhouse cover plate P008700 - low fuel pressure P042000: Catalyst System,Bank1 Efficiency Below U060B00 - no com to G31 boost pressure sensor Airbag light on, DTCs B101704, B103604 Water intrusion from sunroof Wind noise from front doors at highway speeds |
| AVIN4PIN20240305 | 2024-04-05. Service bulletin. Noise from front door trim panel while driving Low coolant warning in cluster, coolant level is correct Front window inoperative Air suspension warning - DTC P089200 charge handle doesn't release vehicle will not charge Temp sensor DTC P218500 Corrosion on wheelhouse cover plate P008700 - low fuel pressure P042000: Catalyst System, Bank1 Efficiency Below |
3 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.