Hello there,
Check the value of Particle Filter Differential Pressure Sonsore.
With engine IDLE it should be under 7mbar, and in full load around 20.
If this value it higher than 100mbar your Particle Filter it's full or the sensor may be broken.
In order to check if first replace the sensor and check again if you still got this high value, you have to possibilities DPF off or replacement.
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