What does filter additive low warning message on Peugeot 307 mean?

The "Filter Additive Low" warning message on a Peugeot 307 indicates that the diesel particulate filter (DPF) additive, typically Eolys fluid, is running low. This additive helps to reduce particulate emissions by lowering the combustion temperature of soot in the DPF. If this warning appears, it's important to have the additive topped up at a service center to ensure proper function of the DPF and to avoid potential engine performance issues or increased emissions. Ignoring the warning can lead to more serious problems in the exhaust system.