DPF Ash Loading
DPF ash is the non-combustible residue that builds up in a diesel particulate filter and cannot be burned off.
What is DPF Ash Loading?
It comes mainly from additives in the engine oil. Regeneration removes soot but not ash. Over many kilometres it slowly reduces filter capacity. The control unit estimates ash load from oil consumption and distance.
How it works
Ash particles remain in the filter channels and gradually fill the filter.
Why it matters for your car
Low-ash oils that meet the manufacturer's specification slow ash build-up. A filter full of ash needs professional cleaning or replacement.
Other terms
- Boost Leak
- Bulb Failure Warning
- Coolant Expansion Tank
- Detonation (Engine Knock)
- Directional Tyres
- Driving Licence Categories
- Engine Mount
- Engine Speed (Rpm)
- Exhaust Flex Pipe
- Matching Numbers
- Oil Level Sensor
- Post-crash Safety Inspection
- Recirculation Mode
- Redline
- Retreaded Tyre
- Spaceframe Chassis
- Speed Limiter
- Turbocharger
- USB-C Port In The Car
- VVT Solenoid (Camshaft Control Valve)