In the exhaust is a soot filter known to PSA as a FAP. It regenerates [a sort of deliberate chimney fire] and burns some of the soot off every few thousand miles. The cerium additive is called Eolys [go Google] and is stored next to the diesel tank with a computer controlled dosing mechanism.
If you don't drive it long enough, fast enough; then the regeneration process won't commence and the filter will block. Take it for a 40 minute blast down a empty dual carriageway; it's unbroken time above 50 [around six minutes] that will start the process.
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In the exhaust is a soot filter known to PSA as a FAP. It regenerates [a sort of deliberate chimney fire] and burns some of the soot off every few thousand miles. The cerium additive is called Eolys [go Google] and is stored next to the diesel tank with a computer controlled dosing mechanism.
If you don't drive it long enough, fast enough; then the regeneration process won't commence and the filter will block. Take it for a 40 minute blast down a empty dual carriageway; it's unbroken time above 50 [around six minutes] that will start the process.
Alternatively; take it to your dealer