Check Anti Pollution system Solved in 1 minute, Renault Megane 3. Check my second video too 

Check Anti Pollution system Solved in 1 minute by using DPF Cleaner liquid inside fuel tank(where you put diesel).
check anti pollution system, check auto gear box error appears in my Renault Megane 3.
it happened while driving in snowy weather.
it happened as diesel particle filter is not self regenerative meaning not cleaning the soot.
the expensive solution is
1- replace diesel particle filter.
2- take the diesel particle filter and clean it chemically.
but it may be cleaned by cheap solution
1- clean by diesel particle filter cleaner liquid, which is put inside the diesel tank.
it may happened that diesel particle filter cleaner may be temporarily clean the dpf so error appears again.
i hope it is useful to you.