2006 Jaguar S-Type when accelerating car often goes into l

Tiny
NAZGUL46
  • MEMBER
  • 2006 JAGUAR S-TYPE
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 4,100 MILES
Hi, have recently bought 2.7 diesel from main delaer, car has gone into limp mode 4 times now, all when I am acceleratng onto motorwy, they have diagnosed 1. PDF filter
2. EMV
3. Dirty air flow filter
however this is still happening, have only had the car 5 weeks.
Any ideas please?
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Monday, June 15th, 2009 AT 5:46 AM

2 Replies

Tiny
JACK42
  • MEMBER
I have forwarded your question to our Jaguar tech. He will be with you shortly, thank you for your patience
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Tuesday, June 16th, 2009 AT 8:11 AM
Tiny
DAVE H
  • EXPERT
Hello .. thanks for the donation .. much appreciated

I suspect the DPF is your fault .. it is clogged and needs clearing ...surely if you bought the car from a dealer you got a warrenty ?? If so, it is there responsibility to repair the vehicle

Diesel Particulate Filters (DPFs)

Particulates, or soot particles are the most visible of the pollutants emitted from the exhaust of a diesel engine, they consist of large carbon particles with other attached and absorbed chemicals. Particulates in addition to being visible are toxic and carcinogenic, and the smaller particle of less than 10 microns (known as PM10s) can penetrate deep into the lungs causing respiratory problems. With the increased use of diesel engines, the increase in air borne particulates is becoming an increasing environmental issue.

These solid emissions can be effectively reduced by filtration of the exhaust. The most effective and practical method is by using a ceramic filter sustrate, usually silicone carbide with microporus walls. This traps the solid particles and allows the gasses to escape through the wall and is vented into the exhaust outlet.
The collected soot builds up within the filter, which will clog and eventually block resulting in a build up of engine back pressure unless it is removed, which is achieved by a process known as regeneration.
Regeneration is achieved by burning the collected soot within the filter, either actively or passively. In an active system a separate, usually electrical, heat source is applied to raise the temperature to a point where the carbon particles are burnt off to produce CO2. In the passive system the heat of the engine exhaust gas is used in conjunction with a special catalytic coating on the filter to achieve the same result

when the anti pollution light came on! It was simply telling you that the Diesel Particulate Filter (DPF) was almost full of soot and the car needed to be driven for 30 miles or so at 40 - 50 mph or above to burn off the accumulated soot and clear the filter. This is not a fault with the car - simply a feature of cars with a DPF. (I often get asked why you can't simply change the filter rather than wasting fuel going for a long drive to clear it. The answer is, you can. The cost is between 1000/ 2000, which makes that drive look suddenly economical).

Hope this helps .. please let me know


http://www.2carpros.com/forum/automotive_pictures/266999_AAA2_788.png

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Wednesday, June 17th, 2009 AT 4:04 AM

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