VW Golf Coasting Battery operation , the Q Diode and Fault Code P25FF00 - VOLKSWAGEN

This video explains the operation of the Volkswagen eco-coasting function, the main components involved ( Battery and Q Diode) and the common fault that occurs ( P25FF00 )
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Filmed using a GoPro hero 4 and an iPhone.

[@paulkillick3419]

Hi, I’ve not long taken ownership of a 2019 VW 1.5 DSG evo bluemotion and this coasting thing in my opinion is ridiculous and here’s my issue. In eco or normal mode with the start/stop turned on to stop the car from cutting out and starting every time I stop the coasting facility still causes the engine to stop and then start again and the only way to stop this is to drive in sport mode. I’m no alone with this as several Golf and Skoda owners have posted the same thing. I have access to a new VCDS unit but need to fine a suitable coding to switch the coasting feature off.