U1421 on the 2020 Audi A6
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.
| TSB_2056076_22 | 2025-04-04. Service bulletin. This bulletin provides information when there is an SOS Malfunction with ConBox Low, "Emergency call function: fault", (DTC U142100, U153E00). |
|---|---|
| A9124522056076_21 | 2024-10-28. Service bulletin. This bulletin provides information when there is an SOS Malfunction with ConBox Low, "Emergency call function: fault", (DTC U142100, U153E00). |
| A9123492056076_2 | 2023-12-06. Service bulletin. This bulletin provides information when there is no diagnostics communication to the telematics control module in vehicles with ConBox low; DTC U142100. |
| A9123192056076_1 | 2023-09-01. Service bulletin. This bulletin provides information for when there is no communication to the telematics control module, DTC U142100. |
| A912308205607618 | 2023-07-10. Service bulletin. Ths bulletin provides information for when no diagnostics communication to the telematics control module; DTC U142100 may be stored. |
| A9123702062973_4 | 2023-03-06. Service bulletin. This bulletin provides information for when an SOS malfunction is displayed in the instrument cluster; DTCs U142100, U164200, and/or U122C00. |
| A9122442062973_3 | 2022-12-06. Service bulletin. This bulletin states that an SOS malfunction accompanied by DTCs U142100, U164200, and/or U122C100 my be stored erroneously and the ETCs should be cleared. |
| A9122332062973_2 | 2022-10-05. Service bulletin. This bulletin states that an SOS malfunction accompanied by DTCs U142100, U164200, and/or U122C100 my be stored erroneously and the ETCs should be cleared. |
| A9022732052299_5 | 2022-07-01. Service bulletin. This bulletin contains repair instructions for proper transport mode deactivation (DTC U142100, DTC P169A00, and U13EB00 ). |
| A9022462052299_4 | 2022-03-04. Service bulletin. This bulletin contains repair instructions for proper transport mode deactivation (DTC U142100, DTC P169A00, and U13EB00 ). |
11 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.