P20E8 on the 2015 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.
Nobody has written a description of this code yet.
| A011689 2040962- | 2018-03-13. Service bulletin. This bulletin provides information for a hardware and software update for TDI clean diesel vehicles with DTC P20E800. |
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| A0115322040962-2 | 2018-02-05. Service bulletin. Supersedes Technical Service Bulletin Group 01 number 15-25 dated June 19, 2015. The MIL is on. DTC P20E800 (Reductant pressure too low) is stored in the engine control module. No relevant component or electrical problems are found when Guided Fault Finding (GFF) is run on the stored fault codes. Hardware and software update is needed. |
| A011525 2040962- | 2017-10-25. Service bulletin. The MIL is on. DTC P20E800 is stored in the ECM. No relevant component or electrical problems are found when Guided Fault Finding (GFF) is run on the stored fault codes. Software update is needed. |
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.