Service bulletin 122-R4W5T-09

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)
Type	Service bulletin
NHTSA id	10081304
Published by NHTSA	2016-10-03
Manufacturer's number	122-R4W5T-09
Manufacturer's date	2016-08-08
NHTSA component	ELECTRICAL SYSTEM:SOFTWARE

NHTSA's summary

Due to a software error in the DME control unit, a rough-running engine can occur sporadically during the warm-up phase on the affected vehicles. If this happens, the Check Engine light will be activated.

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Electrical system, Software

Vehicles listed
PORSCHE CAYENNE S E-HYBRID	2015, 2016 (the catalog's model; the bulletin names a series or trim of it)

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
PIWIS2401j	2024-03-04. Service bulletin. Information for PIWIS tester update 42.500.020
CAY224-16	2021-06-28. Service bulletin. DME Control Unit - There is a possibility that an excessively high drive torque will be transferred to the rear axle when the Performance Start function is used on the affected vehicles. If the performance start function is used frequently. Overloading of the drive shafts cannot be ruled out. This can damage the drive shaft on the rear axle.
PIWIS2001v	2020-07-02. Service bulletin. Information on new PIWIS tester update 39.500.020 and .025.
No. 41-20	2020-07-01. Service bulletin. Instructions on how to perform a PVTS Software update in the event that a car will not start.
122-D6B2X-09	2019-09-23. Service bulletin. Instructions for retrofitting Sport Plus Mode on vehciles without sport chrono package already installed.
122-T4M9P-09	2019-09-23. Service bulletin. Instructions for retrofitting Sport Plus Mode on vehciles without sport chrono package already installed.
122-S9X3M-12	2017-12-14. Service bulletin. 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 and transmission control module (Tiptronic) software to bring affected vehicles into regulatory compliance.
122-F7A7X-10	2017-11-08. 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-V6K2R-06	2017-09-14. Service bulletin. Concerns: DME control unit Information: This is to inform you of a voluntary Workshop Campaign on the above-mentioned vehicles. With the previous software for controlling the cooling-air flaps for demand-controlled regulation of engine cooling, there is a possibility that the cooling-air flaps will remain closed at speeds of over 124 mph 200 km/h) on the affected vehicles. If this high speed is maintained, the cooling-air flaps can no longer be opened when additional cooling air is required due to the air force acting on the vanes. In this case, cooling performance can be reduced and as a result, the warning messages "Engine too hot, Park vehicle to cool down" and "Oil temperature too high" can be displayed in the instrument cluster.
122-P9Y8C-06	2017-09-14. Service bulletin. Concerns: DME control unit Information: This is to inform you of a voluntary Workshop Campaign on the above-mentioned vehicles. With the previous software for controlling the cooling-air flaps for demand-controlled regulation of engine cooling, there is a possibility that the cooling-air flaps will remain closed at speeds of over 124 mph (200 km/h) on the affected vehicles. If this high speed is maintained, the cooling-air flaps can no longer be opened when additional cooling air is required due to the air force acting on the vanes. In this case, cooling performance can be reduced and as a result, the warning messages "Engine too hot, Park vehicle to cool down" and "Oil temperature too high" can be displayed in the instrument cluster.