<p>The invention relates to a method for treating exhaust gas applied to an exhaust line for exhaust gas of a vehicle, the exhaust line including a particle filter, the method including a step (40) of determining the density of particles in the exhaust gases on the basis of content value, characterized in that the method also includes a step (20) of selecting the content value from between a content (18) measured by an oxygen sensor and a content (19) calculated from information about fuel flow and air flow. Such a method makes it possible to more precisely determine the particle density and thereby better estimate the appropriate times for regenerating the particle filter.</p>
