P0556 on the 2013 Porsche Panamera
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.
| ATI41303 | 2021-06-28. Service bulletin. ATI - Fault P055600 Brake Vacuum System: Mechanical Fault Stored in DME (1303) - Check Engine and Hybrid warning illuminated. |
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| 122-B9S9K-07 | 2018-08-06. Service bulletin. Concern: Check Engine and Hybrid warning illuminated Information: If the fault P055600 is stored in the DME, the brake booster vacuum system must be function tested as per the information in Guided Fault Finding and Diagnosis Information. |
| 122-B9S9K-07 | 2018-07-30. Service bulletin. Concern: Check Engine and Hybrid warning illuminated Information: If the fault P055600 is stored in the DME, the brake booster vacuum system must be function tested as per the information in Guided Fault Finding and Diagnosis Information. |
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.