Question about 2005 Jaguar S-Type

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Jaguar S Type, DPF light will not go out even though it has been replaced

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It doesn't rave to ignite and clean the exhaust system even though i press the dpf button

Posted on Dec 09, 2011

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The DPF filters, harmful particulates (soot) from the exhaust gas and has been designed to regenerate (clean) itself automatically, however it can only do this by heating the DPF to high temperature, the ECU injects additional fuel on the exhaust stoke to increase exhaust gas temperatures to raise DPF temperature(600?C) to ignite and clean the soot away, however it can only do this at high RPM (above 2.000rpm) so if it comes on, you need to drive at high speed for 20-30minutes to clean the DPF

Posted on Jan 02, 2011

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I have a xf luxury v6 diesel jaguar which starts but doesnt rev up. Diagnostics shows dpf filters full.


try changing the filters for the fuel or check the exhaust particle filters for blockage ( blocked exhaust system)

Jan 09, 2015 | Jaguar Cars & Trucks

1 Answer

Error code 55 on vauxhall meriva whats it mean


Error 55 is Diesel Particulate Filters (DPF)
Reducing diesel soot emissions by 80%

If you're buying a new car and plan to use it mainly for town-based, stop/start driving it would be wise to avoid a diesel car fitted with a Diesel Particulate Filter (DPF) because of the possible hassle of incomplete 'DPF regeneration'.

The exhaust emissions standards for new cars have effectively required fitment of a DPF in the exhaust of diesel cars since 2009 when the 'Euro 5' standard came into force. In fact, many cars registered before 2009 will have had one fitted too in anticipation of the change in standards.

Standards aim to deliver an 80% reduction in diesel particulate (soot) emissions but the technology's not without problems - AA patrols are regularly called to cars with the particulate filter warning light on indicating a partial blockage of the filter.

Even if your driving isn't mainly urban/stop-start, changes to driving style may be required to get maximum benefit from these systems.

How do they work?
Diesel Particulate filters (DPF) or 'traps' do just that, they catch bits of soot in the exhaust.

As with any filter (think of the bag in your vacuum cleaner) they have to be emptied regularly to maintain performance. For a DPF this process is called 'regeneration' - the collected soot is burnt off at high temperature to leave only a tiny ash residue.

Regeneration may be either passive or active.

Passive regeneration
Passive regeneration takes place automatically on motorway-type runs when the exhaust temperature is high. Because many cars don't get this sort of use car manufacturers have to design-in 'active' regeneration where the engine management computer (ECU) takes control of the process.

Active regeneration
When the soot loading in the filter reaches a set limit (about 45%) the ECU can make small adjustments to the fuel injection timing to increase the exhaust temperature and initiate regeneration. If the journey is a bit stop/start the regeneration may not complete and the warning light will come on to show that the filter is partially blocked.

It should be possible to start a complete regeneration and clear the warning light by driving for 10 minutes or so at speeds greater than 40mph.

If you ignore the warning light and keep driving in a relatively slow, stop/start pattern soot loading will continue to build up until around 75% when you can expect to see other dashboard warning lights come on too. At this point driving at speed alone will not be enough and you will have to take the car to a dealer for regeneration.

Expensive repairs
If you continue to ignore warnings and soot loading keeps increasing then the most likely outcome will be that you will have to get a new DPF costing around £1000.

DPF additives
The most commonly fitted type of DPF has an integrated oxidising catalytic converter and is located very close to the engine where exhaust gases will still be hot. This heat means that passive regeneration is possible.

There's not always space close to the engine though so some manufacturers use a different type of DPF which uses a fuel additive to lower the ignition temperature of the soot particles so that the DPF can be located further from the engine.

The additive is stored in a separate tank and is automatically mixed with the fuel whenever you fill up. Only very small quantities are used though so a litre of additive should treat around 2800 litres of fuel - enough to cover 25,000 miles at 40mpg.

You will have to pay to get the additive tank refilled at some time in the car's life, and we've heard reports of dealers charging up to £200 to re-fill a half empty tank.

AA experience
We're seeing some evidence of DPF systems failing to regenerate even on cars used mainly on motorways.

On cars with a very high sixth gear the engine revs may be too low to generate sufficient exhaust temperature for regeneration. Occasional harder driving in lower gears should be sufficient to burn off the soot in such cases.

With this type of DPF regeneration will be initiated by the ECU every 300 miles or so depending on vehicle use and will take 5 to 10 minutes to complete. You shouldn't notice anything other than perhaps a puff of white smoke from the exhaust when the process is completed.

There's no evidence in AA breakdown data that the problem's going away - newer car models seem just as likely to sufffer DPF problems if not driven 'correctly' as those built when DPF's were introduced.

Check the handbook
If you buy a car with a DPF fitted it's important to read the relevant section of the vehicle handbook so that you understand exactly what actions to take if the warning light illuminates and how, if at all, your driving style may need to be adjusted to ensure maximum DPF efficiency and life.

Oct 28, 2013 | Subaru Cars & Trucks

1 Answer

DPF and ZIG ZAG ligh lit up. Fault code p0486


what engine, ? in what country>?
gas/petrol/diesel?
what displacement?
my guess, is this is diesel, and is EGR. but im a bad guesser.

Mar 13, 2013 | Suzuki Grand Vitara Cars & Trucks

2 Answers

Dpf full warning light


Whenever this warning or any other stays on in the dash it is indicating that the systems control module has detected a fault, it then disables the system as long as the light is on. You must now have the dealer hook up a special electronic diagnostic tool and "scan" the system for the fault code that is stored for the problem(s)

Sep 20, 2012 | 2006 Jaguar S-Type

2 Answers

I have a DPF light that despite following the Suzuki guideliness to drive at certain speed for a certain amount of time, this light has not cleared. I have already had a sensor in the exhaust replaced that...


A diesel particulate filter (DPF) collects particulates in the engine's exhaust, basically unburned fuel. Every so often the DPF will need to regenerate. What this means is when a certain amount of particulates accumulate in the DPF, a small amount of raw fuel is injected into the DPF to increase the temperature. The increased heat burns the particulates resulting in fewer nasty things going into the atmosphere. However, the regeneration process leaves a small amount of ash in the DPF which accumulates over time. You may have to have the DPF professionally cleaned (it's not a DIY thing) in order to restore its performance.

Mar 19, 2011 | Suzuki Grand Vitara Cars & Trucks

2 Answers

DPF FULL


The DPF is designed to 'Burn off' the soot deposits that accumulate, but in order for this to happen the exhaust has to become really hot. The DPF will fill up if the vehicle does a lot of short trips and the exhaust fails to get hot. The cure is a long hard drive

May 11, 2010 | 2009 Jaguar XF

1 Answer

1984 jaguar HE backlights wont work. thought it


fuses for those lights are under the glove box on the passenger side... Even though they look ok... replace the fuse for that circuit... if it fixes great otherwise it may be the fuse block... not an easy fix.

Feb 09, 2010 | 1984 Jaguar XJ

1 Answer

My 2003 impala was showing the PO 401 code and I replaced the egr valve and cleaned out the line. The light will not reset even though I have disconnected the battery and done many silly things recommended...


You will need to reset the light with an OBD2 scan tool on this vehicle. If it comes back on the problem has not been fixed. It can be cracked hoses, DPF sensor, or the EGR valve solenoid.

Jan 27, 2010 | 1993 Saturn SC2

2 Answers

Diesel particle filter keeps blocking


This is down to the way the vehicle is driven, if you are doing a lot of short stop start journeys the dpf will fill up a lot quicker than when driven on a motorway.
If you have an amber light and 'DPF FULL' displayed you can do a particle filter regeneration. To carry out a regeneration the vehicle must be driven on a motorway at around 60mph for approx 20 mins to carry out re-gen, there will also be a burning smell when this is complete.
If you have a red light and 'DPF FULL' displayed then there may be a fault which will require investigation.

Jul 07, 2009 | 2007 Jaguar S-Type 3.0 Sedan

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