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Service bulletin 122-J4H9M-12

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 id10125210
Published by NHTSA2017-12-14
Manufacturer's number122-J4H9M-12
Manufacturer's date2017-11-08
NHTSA componentELECTRICAL SYSTEM:SOFTWARE; ENGINE

NHTSA's summary

Situation: Cayenne Diesel vehicles were equipped with undisclosed Auxiliary Emission Control Devices which are not permitted by emissions regulations. Action Required: Install updated engine control module (DME) software, transmission control module (Tiptronic) software and hardware to bring affected vehicles into regulatory compliance.

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, Engine, Software

Vehicles listed
PORSCHE CAYENNE2013, 2014

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. 41-202020-07-01. Service bulletin. Instructions on how to perform a PVTS Software update in the event that a car will not start.
122-T4M9P-092019-09-23. Service bulletin. Instructions for retrofitting Sport Plus Mode on vehciles without sport chrono package already installed.
122-F7A7X-102017-11-08. Service bulletin. The rear lid closes at a higher speed particularly at cold temperatures. The signal from the microswitch in the lid lock is too short and cannot be read out clearly by the control unit software.
122-W5S3Z-062017-08-01. Service bulletin. Concerns: Electronic logbook in Porsche Communication Management (PCM) 3.1 Information: This is to inform you of a voluntary Workshop Campaign on the above-mentioned vehicles. Implausible entries can appear in the logbook (e.g. negativemileage, double entries) on the affected vehicles due to incorrect PCM software. Earlier entries in the logbook can even be overwritten in some cases.
122-J8L6N-092016-10-03. Service bulletin. ENABLING ONLINE SERVICES