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Service bulletin No. 93-21

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10213133
Published by NHTSA2022-06-03
Manufacturer's numberNo. 93-21
Manufacturer's date2022-05-27
NHTSA componentELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM); ELECTRICAL SYSTEM

NHTSA's summary

Technical information on the PCM - does not work, reset central computer

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Transmission and driveline, Automatic transmission, Software, Transmission control module

Vehicles listed
PORSCHE MACAN2019, 2020, 2021

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
PIWIS2401j2024-03-04. Service bulletin. Information for PIWIS tester update 42.500.020
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No. 173-202020-12-02. Service bulletin. Instructions for fixing the navigation in the PCM in the event that it is loading slowly.
No. 20202020-10-01. Service bulletin. Information on new special tool for offline updates of the PCM Versions 4 and 5.
No. 118-202020-09-02. Service bulletin. Instructions for how to assist if the selector lever is in Park position but not detected, and the key cannot be removed.
No. 85-202020-08-05. Service bulletin. Instructions for reprogramming the instrument cluster in the event of the park assist buzzer sporadically cutting out.
PIWIS2001v2020-07-02. Service bulletin. Information on new PIWIS tester update 39.500.020 and .025.
No. 41-202020-07-01. Service bulletin. Instructions on how to perform a PVTS Software update in the event that a car will not start.
No. 20052020-06-02. Service bulletin. Information on new VCI cables available for purchase by dealers.
122-E5C9R-012020-01-03. Service bulletin. Instructions for clearing a fault code for a temporary brake warning caused by vacuum actuation as a result of Porsche Stability Management.