04

DPF SYSTEM

 

Diesel particulate filter (called DPF or FAP) is a filter located just after the turbocharger and is specially designed to reduce the amount of diesel particulate matter (soot / ash). The purpose of this filter is to create cleaner / more environmentally friendly exhaust gases emitted to the atmosphere.

Diesel particulate filter gradually decreases its efficiency and is more and more clogged, which is a normal part of its life. A process called regeneration sometimes aims to “clean up” the particle filter. Unfortunately, this requires special driving conditions, and if they are not met, the degree of filter clogging may exceed the threshold where the engine control computer is capable of regenerating the filter – which leads to power loss problems and even the risk of damage to other equipment due to overheating of the filter .

PRINCIPLES

 

A substantially blocked DPF filter is usually caused by another major problem. It is worth taking further diagnostics to find the reason for this situation.

 

Things that can lead to blocking the DPF filter:

 

  • Short trips – vehicles with a large “urban driving” are more prone to blocking because the DPF filter does not reach sufficient temperature. In order for the DPF regeneration process to work efficiently and burn coal deposits, the engine must often reach the correct operating temperature.

  • Damaged / defective sensors – DPF has several sensors that are installed before and after the filter. These sensors are adapted to monitor the initial and final temperatures as well as the back pressure of the filter. If one or more of these sensors fail, the regeneration process may stop running.

  • Defective / Damaged EGR Valve – The EGR valve is designed to recirculate the exhaust gases back to the engine before passing through the DPF. In some cars, if the EGR system is not working effectively or is blocked, the amount of exhaust gas flowing through the DPF will be increased potentially increasing the blocking of the DPF.

  • Faulty / damaged swirl flaps – Like the EGR valve, the swivel flaps are fitted to help control the emissions in the vehicle. If they do not work effectively, it can potentially accelerate DPF blocking.

  • Failed Regeneration – Some conditions must be met before the DPF can regenerate. If we stop this process or these prerequisites are not met, the DPF filter will not regenerate.

 

DATA TROUBLE CODES - DTC

 

 

 All of these problems can be solved by removing DPF and remapping the ECU.

 

 

  • P0470 – Exhaust pressure sensor malfunction

  • P0471 – Exhaust pressure sensor range/performance

  • P2002 – DPF efficiency below threshold (Bank 1)

  • P2003 – DPF efficiency below threshold (Bank 2)

  • 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)

  • P242F – Dpf restriction – Ash accumulation

  • 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

  • P2458 – DPF regeneration duration

  • P2459 – DPF regeneration frequency

  • P2463 – DPF Restriction – Soot accumulation

SIGNS

 

Symptoms that can be observed when there is something wrong with the DPF / FAP and you should look for a professional car workshop service:

 

  • Smoke behind a car

  • Higher fuel consumption

  • Turbo Lag

  • Emergency Mode

  • DPF/FAP Light

  • Engine light

Our Services

- Performance Map

- Economy Map

- EGR Removal

- DPF Removal

- Speed Limiter Removal

- Diagnostics

Opening Hours

9am - 6pm

Monday - Saturday

Contact Us

Brunswick Road

Worthing

West Sussex

BN11 3NG

Tel: (+44) 07729 467 002
jsremapping@mail.com

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