WHAT IS A DPF?
DPF stands for Diesel Particulate Filter. DPF units filter, capture and store toxic particulates being emitted from your car’s exhaust (exhaust soot).
DPF units became mandatory in 2009 when the Euro 5 exhaust emissions legislation was introduced. Aside being a legal requirement, DPF units protect the environment from harmful emissions.
A clean well maintained Diesel Particulate Filter will enable your engine to maintain optimum efficiency and performance levels.
With most vehicles the DPF warning light will illuminate to notify you that the unit is becoming blocked and requires regeneration. When conditions are met for regeneration, it will attempt to burn off the built up soot using either an active, or passive regeneration. If the regeneration is unable to occur or fails you may be treated to an additional warning light on your dash. This usually occurs when the DPF is blocked beyond the point at which a normal regeneration will clear it and indicates a garage visit is required.
Common faults we can help fix:
P2002 – DPF efficiency below threshold (Bank 1)
P2003 – DPF efficiency below threshold (Bank 2)
P2458 – DPF regeneration duration
P2459 – DPF regeneration frequency
P2463 – DPF Restriction – Soot accumulation
Examples of problems when DPF sensors are faulty and need to be fixed. A DPF clean may still be required.
P0470 – Exhaust pressure sensor malfunction
P0471 – Exhaust pressure sensor range/performance
P2031 – Exhaust gas temperature sensor circuit (bank 1 sensor 2)
P2032 – Exhaust gas temperature sensor circuit low (bank 1 sensor 2)
P2033 – Exhaust gas temperature sensor circuit high (bank 1 sensor 2)
P2034 – Exhaust gas temperature sensor circuit (bank 2 sensor 2)
P2035 – Exhaust gas temperature sensor circuit low (bank 2 sensor 2)
P2036 – Exhaust gas temperature sensor circuit high (bank 2 sensor 2)
P244A – DPF differential pressure too low (Bank 1)
P244B – DPF differential pressure too high (Bank 1)
P2452 – DPF pressure sensor A circuit
P2453 – DPF pressure sensor A circuit range/performance
P2454 – DPF pressure sensor A circuit low
P2455 – DPF pressure sensor A circuit high
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