What about old diesel cars that are rejected after a revamped soot test? “Garages don’t always know what to do”

Even the solutions offered by garages are sometimes too limited. “It is true that the possible culprit may be the particulate filter. This is logical in itself, because the particulate filter is subject to wear. Even if a bad measurement result can have other causes as well. Think, for example, of a valve. which does not work properly any longer, with a bad result in combustion. “

Fortunately, change is on the way. “New preparations have just begun to better serve the customer in the future. The goal is to improve car emissions, and this is good for the environment, air quality and the consumer.”