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P2181 on the 2020 Audi A8

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.

Bulletins for this model year that name P2181
A1924732062951_42025-01-07. Service bulletin. This bulletin provides information when the red coolant warning lamp is on, DTCs P218100, P017B00, P017C00, and/or P017E00 are stored in the ECM.
A1924712075878_12024-12-04. Service bulletin. This bulletin provides information when the MIL is on, or the red coolant lamp lights up; DTC P218100 and/or P1BB400.
A1924692069248_82024-11-06. Service bulletin. This bulletin provides information when the red coolant warning lamp comes on OR MIL on, DTC P218100 and/or P1BB400.
A1924662069248_72024-10-28. Service bulletin. This bulletin provides information when the red coolant warning lamp comes on or MIL on, and DTC P218100 and/or P1BB400.
A1924642069248_62024-09-06. Service bulletin. This bulletin provides information when the red coolant warning lamp comes on or MIL on, and DTC P218100 and/or P1BB400.
A1924642069248_62024-09-06. Service bulletin. This bulletin provides information when the red coolant warning lamp comes on or MIL on, and DTC P218100 and/or P1BB400.
A1923432069248_52023-10-05. Service bulletin. This bulletin provides information for when the red coolant warning light or the MIL is illuminated, DTC P218100 and/or P1BB400.
A1923422069248_42023-10-05. Service bulletin. This bulletin provides information for when the red coolant warning light or the MIL is illuminated, DTC P218100 and/or P1BB400.
A1923412062951_32023-10-05. Service bulletin. This bulletin provides information for when the red coolant warning lamp is on and the DTCs P218100, P017B00, P017C00, and/or P017E00 are stored in the ECM.
A1923402069248_32023-09-01. Service bulletin. This bulletin provides information for when the red coolant warning lamp or MIL illuminate with DTC P218100 and/or P1BB400.

19 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.