B188C on the 2024 Mercedes-Benz AMG GT
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.
| LI88.50-P-080263 | 2026-07-14. Service bulletin. Complaint The trunk lid does not open or close completely and must be operated manually by the customer. The following fault codes are stored in the PTCM control unit: • P1CA000 • B188C2A Cause If the trunk lid is repeatedly opened manually or the vehicle has experienced undervoltage, the trunk lid loses its normalization due to faulty software coding. Remedy For vehicles with a production date up to 01/22/26 (SL (232)) or 01/27/26 (GT (192)) 1. Update the HKS N121/1 control unit and perform SCN coding. (If no new software is available, still perform SCN coding) 2. Perform normalization of component 'N121/1 (Liftgate control control unit)'. Vehicles produced from January 22, 2026 (SL (232)) and January 27, 2026 (GT (192)) onward were factory-fitted with the correct Software Calibration Number Table. |
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| LI88.50-P-080263 | 2026-03-11. Service bulletin. Complaint The trunk lid does not open or close completely and must be operated manually by the customer. The following fault codes are stored in the Tailgate Control (HKS) control unit: P1CA000 & B188C2A Cause If the trunk lid is repeatedly opened manually or the vehicle has experienced undervoltage, the trunk lid loses its normalization due to faulty software coding. Remedy For vehicles with a production date up to 01/22/26 (232) or 01/27/26 (192): Update the HKS N121/1 control unit and perform SCN coding. • If no new software is available, perform SCN coding. Vehicles with a production date 01/22/2026 (232) or 01/27/2026 (192) and later have already received the correct QNT from the factory. |
2 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.