Your light on your FAP turns on and you do not know where the malfunction is coming from. The FAP is mainly for cars Diesel, although we will find them now for petrol cars. Just before you get into repairs for your Citroen Saxo, it is important to know what the problem is with. How does a particle filter work? Why does the light go on? What can be the most common problems? In this article, we will go over the question. 
What is a FAP for on your Citroen Saxo
As its name suggests, it has the role of filtering microscopic particles harmful of your engine. The molecules are so tiny that they easily enter our body. For information, it's Peugeot who created the particle filter. Your catalyst's role is to lower the level of particles emitted from the engine, and the FAP collects the surplus. It is therefore essential to have a particle filter in good condition if you do not want your Citroen Saxo to pollute the environment.
Why the FAP indicator light on your Citroen Saxo
The FAP of your Citroen Saxo is clogged
This is the most common malfunction. And this is normal, a FAP becomes blocked over time. Particles pile up and thus prevent the flow of exhaust gases. Generally, the FAP of your Citroen Saxo must purge on its own and therefore eliminate clumps. However, if it is too old it will have to be replaced.
An electronic problem
The concern for these indicator lights is that we are not sure that there is a malfunction. In fact, it happens regularly that a light comes on while your Citroen Saxo is working properly. This FAP has a few electronic sensors which send a signal to the dashboard. In the event that these sounders do not work well while this FAP is working perfectly, it is possible that the LED will trip.
What to do if the FAP indicator on your Citroen Saxo lights up?
At first, it is perfectly illegal to remove the fap from your vehicle! This is an offense. You will need to check the sensors to see if they are working properly. If these work properly, the problem comes from the FAP. If it turns out to be dirty, it can be cleaned by driving on high speed for 10 to 15 minutes. Without exaggerating, it could damage the vehicle. It is advisable to drive to 3000 rpm. The heat of the engine block will cause this stored dirt to roast, and release the FAP. If such a procedure does not work well, it will have to be changed.
Conclusion:
A damaged particle filter should pollute and decrease acceleration. It is therefore essential to have it changed. Leave us a comment in case our article helped you. Good walk !