P1BB4 on the 2021 Audi SQ7
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.
| A1924712075878_1 | 2024-12-04. Service bulletin. This bulletin provides information when the MIL is on, or the red coolant lamp lights up; DTC P218100 and/or P1BB400. |
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| A1924692069248_8 | 2024-11-06. Service bulletin. This bulletin provides information when the red coolant warning lamp comes on OR MIL on, DTC P218100 and/or P1BB400. |
| A1924662069248_7 | 2024-10-28. Service bulletin. This bulletin provides information when the red coolant warning lamp comes on or MIL on, and DTC P218100 and/or P1BB400. |
| A1924642069248_6 | 2024-09-06. Service bulletin. This bulletin provides information when the red coolant warning lamp comes on or MIL on, and DTC P218100 and/or P1BB400. |
| A1924642069248_6 | 2024-09-06. Service bulletin. This bulletin provides information when the red coolant warning lamp comes on or MIL on, and DTC P218100 and/or P1BB400. |
| A1923432069248_5 | 2023-10-05. Service bulletin. This bulletin provides information for when the red coolant warning light or the MIL is illuminated, DTC P218100 and/or P1BB400. |
| A1923422069248_4 | 2023-10-05. Service bulletin. This bulletin provides information for when the red coolant warning light or the MIL is illuminated, DTC P218100 and/or P1BB400. |
| A1923402069248_3 | 2023-09-01. Service bulletin. This bulletin provides information for when the red coolant warning lamp or MIL illuminate with DTC P218100 and/or P1BB400. |
| A1923382069248_2 | 2023-06-06. Service bulletin. This bulletin provides instructions for when the red coolant temperature is displayed in the instrument cluster and the engine fans are running bu the coolant temperature gauge does not display an excessively high temperature, or the MIL may be illuminated with DTCS P218100, P1BB400. |
| A1923342069248_1 | 2023-02-07. Service bulletin. This bulletin provides instructions for when the red coolant temperature is displayed in the instrument cluster and the engine fans are running bu the coolant temperature gauge does not display an excessively high temperature, or the MIL may be illuminated with DTCS P218100, P1BB400. |
10 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.