I may be wrong but I think the introduction of GPF’s on the
mk3 Leon coincided with the change from the NEDC to WLTP testing procedures, and that was around the end of Q3 / beginning of Q4 2018.
My VW has a GPF and decided a forced regeneration was necessary Thursday just gone. I think it was the third one in just over three years. Lasted around 20 minutes and the ‘tell tale’ signs were there; louder exhaust note, slight hesitancy / lumpiness to the engine when accelerating and significant worsening (around 30-35%) in fuel consumption. I’ve never had the same or similar warning message to
@DaveMac though.