Today I’ve noticed that when I floor the throttle, a tiny bit of white smoke comes out. It’s clean when it’s idling. However, prior to that I’ve been driving for two hours non stop. Coolant is not disappearing, not overheating. It was ~ -7°C (19°F) and humid outside. The car in question is Scirocco/Golf TDI (DPF removed).

Should I be concerned? Is it just a condensation build up or something more serious?