A lot of Diesel vehicles these days are fitted with DPF filters. Some people aren’t sure what exactly a DPF filter is and might not hear about one until their vehicle goes into limp mode and the garage tells you it may need replacing. The DPF filter is part of the exhaust system and has a similar job to the Catalytic Converter, which is on Petrol and Diesel vehicles. Whilst driving the vehicle, the DPF filter will capture soot deposits in the exhaust gases. After a certain amount of time or when the vehicle registers the soot content has got to certain level, it will put the vehicle in to a regeneration mode and burn off the soot content contained in the DPF filter. Some vehicles use the glow plugs to initiate the regeneration or a fluid is injected at a certain point to aid with burning off the soot content. Drivers might notice a bit of smoke from the rear, the revs of the vehicle might alter or even a message might come up on the display, stating the vehicle is performing a regen on the vehicle.

The issues drivers will find when their vehicle has a DPF filter, if their journeys only consist of maybe dropping the kids off at school, popping to the shops and then home again, the vehicle hasn’t been able to meet its requirements to perform a regeneration of the filter. Ideally, the vehicle wants to be doing about 50mph, keeping the revs steady at about 2-2500rpm. As driving round town most people only get up to 30mph, the car is unable to perform the regen, so the soot content will continue to build up over time. When the content gets too high, the vehicle will illuminate the engine management light and may put the vehicle into limp mode. When using a diagnostic kit on the vehicle to read the fault codes, it may be possible to force them to regenerate whilst either parked up at the garage or following procedures to initiate the regeneration.

This is a consistent problem with Diesel vehicles, mostly because they are not doing the mileage or being driven enough to regen. While we can regenerate DPFs using our diagnostic tool, we can also offer a session on our Hydroflow system. As well as being able to clean the DPF, it will also clean all the internals of the engine, wherever air ventures in the vehicle. For example, Turbo, EGR Valve, Throttle Body, Valves, Catalytic Converter and many other parts. We have had really good results from the Hydroflow, especially for vehicles failing their MOTs on emissions and saving the customer a lot of money. The Hydroflow can be used on both Diesel and Petrols, and doesn’t put any harmful chemicals into the engine.

For more information on our Hydroflow, please don’t hesitate to contact us on 01452 886620.