Your FAP indicator light comes on and you do not know where the malfunction is coming from. FAP is found more on cars Diesel, even if we find them today on gasoline cars. Before you start repairs on your Smart Crosstown, it is necessary to know where this problem comes from. How does a particle filter work? Why is the light on? What are the most common problems? In this article, we will give a point by point overview. 
What is a FAP on your Smart Crosstown for?
As its name suggests, its role is to filter out microscopic particles toxiques of your car. The molecules are so tiny that they easily enter our body. Note that this is Peugeot who made this particle filter. Your catalyst is used to limit the dose of particles emitted by the engine, then the particle filter collects the waste. It therefore remains essential to have a particle filter in good condition if you do not want your Smart Crosstown to pollute the environment.
Why the FAP indicator lights up on your Smart Crosstown
The FAP of your Smart Crosstown is clogged
It is the most frequent dysfunction. No worries, your particle filter becomes clogged the more time passes. Particles form clusters and thus prevent the evacuation of your exhaust gases. Normally, the particle filter of your Smart Crosstown can be cleaned on its own and thus destroy this waste. However, if it is particularly damaged it must be replaced.
An electronic problem
The problem for LEDs is that you are not necessarily sure to have a malfunction. Undeniably, it often happens that an indicator light flickers while your Smart Crosstown is working properly. This particulate filter has several electronic sensors which transmit a warning towards the dashboard. If these sounders are not working well and this particle filter is doing well, it is possible that the indicator light will come on.
What to do if the FAP indicator on your Smart Crosstown lights up?
First, it is completely prohibited to remove the particulate filter from your vehicle! Indeed, it is a crime. You are able to check the probes to see if they are working properly. Assumed that they themselves work well, the problem stems from the FAP. If the latter was dirty, you can repair it by driving at a high speed for around 10 to 15 minutes. Without exaggerating, the process could damage the vehicle. It is advisable to drive at 3000 rpm. The heat of the engine will in this way carbonize the stored soot, and therefore clean this particle filter. In the event that such a procedure does not work well, it will have to be replaced by a new one.
Conclusion:
A fap in bad condition can pollute but also reduce acceleration. It is therefore essential to take care of it. Write a comment if this file helped you. See you soon !