The Diesel Particulate Filter Warning Light comes on for a few reasons:
Soot buildup: The DPF light comes on when the soot level in the diesel exhaust is too high, which can cause the vehicle to enter limp mode.
Blockages: The DPF can become blocked over time, causing a warning light to be displayed on the dashboard.
Regeneration failure: The DPF light can come on if the regeneration process fails.
Passive regeneration failure: Passive regeneration occurs when the vehicle is driven at higher speeds, and if this process fails, the DPF light will come on.
Active regeneration failure: Active regeneration is automatically triggered by the car’s electronic control unit (ECU) when the car has been in motion long enough to reach a certain temperature, and if this process fails, the DPF light will come on.
Faulty DPF pressure sensor: A faulty DPF pressure sensor can also cause the DPF light to come on.
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