The light on your DPF is on and you don't know where the problem is coming from. The FAP is mainly found for vehicles Diesel, even though we will see more and more for petrol vehicles. Before starting repairs for the Renault Grand Scenic 3, it is essential to understand where the malfunction comes from. What is a particle filter used for? Why does the indicator light go off? What can be the most common problems? In this text, we will go around the question. 
What is a FAP used for on your Renault Grand Scenic 3
As its designation suggests, its role is to purify microscopic molecules harmful of your vehicle. These kinds of molecules are so small that they easily fit into our body. For information, it's Peugeot who manufactured the particulate filter. The role of the catalyst is to limit the dose of molecules generated from the engine block, then the particle filter collects the remains. It therefore seems essential to have a FAP in good working order if you no longer want the Renault Grand Scenic 3 to pollute.
Why the FAP indicator light on your Renault Grand Scenic 3
The FAP of your Renault Grand Scenic 3 is clogged
This remains the most recurrent problem. And that's normal, the particle filter becomes dirty as time goes by. The molecules pile up and thus hinder the evacuation of these exhaust gases. A priori, the particulate filter on the Renault Grand Scenic 3 will be able to clean up on its own and thus eliminate clumps. However, if it is too old it must be changed.
An electronic problem
The concern with these indicator lights is that you are not necessarily certain that there is a problem. Indeed, it often happens that a warning light comes on while the Renault Grand Scenic 3 turns without problem. Your particle filter has several electronic sounders which send a message to your dashboard. If your sensors have a problem while the particle filter is working properly, it is still plausible that the indicator light comes on.
What to do if the FAP indicator on your Renault Grand Scenic 3 lights up?
To start, it is absolutely prohibited to remove the particle filter on your Renault Grand Scenic 3! This is an offense. You should check the probes to see if they are working well. If they themselves work well, the dysfunction comes from the FAP. If the latter is dirty, you will be able to unclog it by driving in the towers for about 10 to 15 minutes. Do not climb too much in the towers, the process can damage the engine. We advise you to drive at 3000 revolutions minutes. The temperature of the engine block should in this way carbonize these encrusted soot, and thus clean this particle filter. When this technique does not work, you will have to change it.
Conclusion:
The particle filter in bad condition will then pollute and cause loss of power. It is therefore essential to replace it. Write a comment in case this post served you. Good road !