WF50 – Re-programming Front-end Electronics Control Unit – 2015-2016 Porsche Cayenne S E-Hybrid (92A)



Model Year: As of 2015 up to 2016

Vehicle Type: Cayenne S E-Hybrid (92A)

Concerns: Front-end electronics control unit



This is to inform you of a voluntary Workshop Campaign on the above-mentioned vehicles. The DME control unit and front-end electronics are not switched to sleep mode on the affected vehicles when all the following conditions are met:

  • Ignition is switched off.
  • Filler flap release is actuated.
  • Fuel tank readiness is not yet reached because the pressure in the fuel tank has not yet been reduced. The procedure can take up to 150 seconds, depending on the pressure conditions in the fuel tank (warning in instrument cluster indicates “Establishing tank readiness”).
  • Vehicle is locked within 6 seconds.

This software error in the front-end electronics prevents the control units from entering sleep mode. As a result, the closed-circuit current draw is too high until the ignition is switched on.


Action Required:


The software to be programmed depends on the hardware version of the front-end electronics control unit.

To ensure that the software that is programmed is compatible with the relevant hardware version, the affected vehicles are assigned to different campaign scopes.

Before carrying out the campaign, it is important therefore to check the campaign scope for the vehicle by entering the vehicle identification number of the respective vehicle in PIWIS -> ‘Vehicle information’ menu. The front-end electronics control unit must then be re-programmed by entering the programming code specified in the assigned campaign scope:

•          Scope 1: -> Technical Information ‘WF5000 Scope 1 – Re-programming front-end electronics control unit using software version 3300’.

•          Scope 2: -> Technical Information ‘WF5000 Scope 2 – Re-programming front-end electronics control unit using software version 2930’.

Re-program the front-end electronics control unit using a modified data record.



The total time required for programming and coding the control unit is approx. 5 minutes.


Affected Vehicles:

The VIN(s) can be checked by using PIWIS Vehicle Information link to verify if the campaign affects the vehicle. This campaign is scope specific to the VIN! Failure to verify in PIWIS may result in an improper repair. This campaign affects 797 vehicles in North America.



  • 9818 – PIWIS Tester II with PIWIS Tester test software version 15.700 (or higher) installed.
  • Battery Charger/Power Supply – Suitable for AGM Type batteries, recommended current rating of 70A fixed voltage 13.5V to 14.5V. Refer to Equipment Information EQ-1105.


Download (PDF, 76KB)



For reprogramming and flashing Porsche vehicles without a factory diagnostic device, Porsche recommends the following devices:

Recommended Pass Thru Devices:

J2534 Device

Porsche is not responsible for any content on these two external sites

Pass Thru – Check ECU

Pass Thru – ECU Check verifies the vehicle compliance with the latest air polution restrictions of the following organisations:

Environmental Protection Agency (EPA)
California Air Resources Board (CARB).

Pass Thru – Check ECU checks the Vehicle Identification Number (VIN) stored in the vehicles Digital Motor Electronic (ECU) against the PAG database.

Pass Thru – Check ECU is free of charge and does not require any login.

How to perform a Pass Thru – ECU Check:

  • Enter the Vehicle Identification Number (VIN).
  • In case of EPA offical enter the CVN ID.
  • In case of CARB offical enter the Cal ID.
  • Click the “CHECK ECU Version” button.

If the VIN is valid you see:

VIN IS VALID – User has the latest Update

How to find the VIN:

The VIN is labeled inside the windscreen at the bottom right side: see sample.

How to get the CVN ID / Cal ID:

CVN / Cal IDs can be retrieved with a generic scan tool device.


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