P1388 on the 2018 Porsche Macan
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.
| 122-X9C4Z-03 | 2020-03-05. Service bulletin. Instructions for correcting a check engine light with fault P138800 on Macan models. Remedy is to reprogram the engine electronics with software 38.600.020 or higher. |
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1 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.