Car needs a regen as the lights just come on but I haven't time to go burn it off (TDi Vrs 07)

" will it be ok till tomorrow? "

Thanks

Shouldnt see a problem with it by doing it the following day.

Why do you need a regen?, as your tag says

you have 2007 VRS PD TDi.

These do not have DPF do they?

Is it not a different light?

Why do you need a regen?, as your tag says

you have 2007 VRS PD TDi.

These do not have DPF do they?

Is it not a different light?

Yes I have a Vrs TDi PD, Yes it has a DPF and no it's not a different light

Yes I have a Vrs TDi PD, Yes it has a DPF and no it's not a different light

If you haven't already have a look at this thread:

http://www.pistonheads.com/gassing/topic.asp?h=0&f=86&t=921029&mid=54404&nmt=Tdi%20tuning%20and%20DPF??

Especially the post from 'Tame Technician', it may be helpful.

If you haven't already have a look at this thread:

http://www.pistonhea...g%20and%20DPF??

Especially the post from 'Tame Technician', it may be helpful.

Thanks for that, interesting read

I've been out and carried out a successful Regen

Question is " How empty is the Filter, just enough to turn the light off or completely empty??"

"Whats a Dealer Forced Regen"

Thanks

Edited 30 October, 201015 yr by Auric Goldfinger

i have a pd octavia vrs ans was thinking of a remap.abit confused though should i remove the pdf before the remap or leave it in situ. or just forget about the remap, as the tame technician recons pd,s not good on remaps

Maybe this will help answer some of your questions...

VAG DISESEL PARTICULATE FILTERS

Courtesy of David Bodily Volkswagen Technical Support Specialist

Diesel Particulate Filter (DPF)

Detailed below is important information outlining the function and features of the Diesel Particulate filter which all members of your team need to be aware of.

Diesel particulate filters are becoming more commonplace on diesel engines, particularly sizes 2.0L upwards. This is in order to reduce the exhaust emissions as required by European legislation.

The prime reason for a DPF is to reduce particulate matter entering the atmosphere. Particulate matter is found in the form of soot, which is produced during diesel combustion. The DPF traps most of the soot which would normally travel down the exhaust and into the atmosphere. The DPF can hold a certain amount of soot, but not a huge quantity and therefore it needs to go through a process called regeneration in order to clear the soot loading. When the soot goes through a regeneration process it will be converted to a much smaller amount of ash. The ash is non-removable. There are two types of regeneration, passive and active.

During long motorway journeys, passive regeneration will occur. This needs no intervention from the engine control unit. Due to the raised exhaust temperatures on a long journey (temperatures between 350 and 500°C), the procedure occurs slowly and continuously across the catalytic-coated (with platinum) DPF. The catalytic-coated DPF is situated close to the Engine, therefore the exhaust gas temperature is high enough (500°C) to ignite the soot particles. Due to this soot is burned-off and is converted into a smaller amount of ash.

Active ‘regeneration’ is when the ECU intervenes when the soot loading in the DPF is calculated to be 45%. The procedure lasts for about 5 – 10 minutes. Specific measures are taken by the ECU to raise the engine exhaust temperature to above 600°C, these include switching off the exhaust gas recirculation and increasing the fuel injection period to include a small injection after the main injection. The soot particles are oxidised at this temperature.

The ECU will trigger a regeneration process, if for some reason this is aborted, ie. customer slows down, stops etc, the process will be resumed when regeneration conditions are once again met, above 60km/h (38mph). This will continue for 15 minutes.

If after 2 attempts of 15 minutes, a successful regeneration has not been possible, the loading will increase. At 50% soot loading, the ECU will continue to maintain maximum exhaust temperatures of 600°C to 650°C to cause a regeneration process. The system will try to run a regeneration process for 15 minutes. If unsuccessful, the system will repeat this process for a further 15 minutes, if still unsuccessful, the DPF light on the driver display panel will then be lit.

The owners handbook states, the DPF symbol lights up to indicate that the diesel particulate filter has become obstructed with soot due to frequent short trips. When the warning lamp comes on, the driver should drive at a constant speed of at least 60 km/h for about 10 minutes. As a result of the increase in temperature the soot in the filter will be burned off. If the DPF symbol does not go out, the driver should contact an authorised Volkswagen repairer and have the fault rectified.

At 55% soot loading the DPF light is lit on driver display panel. At this point the customer should follow the advice in the handbook. If they ignore this information and continue driving the vehicle until the soot loading reaches 75% without successful regeneration, additional warning lamps will light up. At this point the customer will also be complaining of lack of power, etc.

At 75%, regeneration is still possible with the use of the VAS tester. Only when the loading is above 95%, is it necessary to replace the DPF unit.

Operating Status System Response

45% DPF Load Level 1

- Normal Regeneration

50% DPF Load Level 2

- Regeneration at maximum exhaust

temperatures

55% DPF Load DPF lamp

Regeneration from 60 km/h

onwards

("See operating manual")

75% DPF Load DPF, SYS and MI lamp

Torque limitation, EGR

deactivation,

Regeneration via VAG tester only

95% DPF Load Replace the DPF Unit

The Warranty department has confirmed that if there is no fault on the vehicle and DPF regeneration has been unsuccessful due to the customers driving style and the customers failure to comply with the instructions in the handbook, DPF replacement will not be paid for by warranty.

Common causes for complaint

• Frequent short journeys – Regeneration conditions are not met.

Not recommended for sale in the Channel Islands and inner city driving.

• Customers who continue to drive the vehicle with DPF light on – Continued

driving with the DPF light on and without successful regeneration results in

excessive soot loading of the DPF, to a point where it is above 95% loaded.

At this point regeneration is not an option and replacement of the DPF is

necessary.

• Fault 18434 particle filter bank 1 malfunction – Common fault code. This does

not only relate to the DPF itself, but the entire exhaust gas handling system. This

can be caused by defective temperature sensors, pressure sensors, additive

system components (if applicable), poor connections, wiring issues, etc.

Important Information

• Before diagnosing a problem vehicle or attempting to perform an emergency

regeneration, it is important to obtain a full diagnostic log and read out relevant

measured value blocks. These MVB’s contain important information on the

condition of the DPF system and are essential in diagnosing the fault. When the

DPF light is illuminated, it does not necessarily mean that the DPF requires

regeneration. For further advice, please contact Technical Support with the

information from the diagnostic log and MVB data.

• If a problem vehicle arrives with the DPF light, the engine management light and

the emissions light on. If during your diagnosis and reading of relevant MVB’s,

you find that the soot loading exceeds 75% (but is still below 95%), an

emergency regeneration procedure must be performed with the VAS tester.

Further to this, the customer needs to be educated. They need to understand

why the lights have appeared on the dash panel. Their attention needs to be

brought to the owners handbook instructions, so that they are aware of what the

DPF light means and what to do when it appears. This should prevent

unnecessary repeat visits for regeneration purposes.

David Bodily

Volkswagen Technical Support Specialist

I've been out and carried out a successful Regen

Question is " How empty is the Filter, just enough to turn the light off or completely empty??"

"Whats a Dealer Forced Regen"

Thanks

Anyone???

i have a pd octavia vrs ans was thinking of a remap.abit confused though should i remove the pdf before the remap or leave it in situ. or just forget about the remap, as the tame technician recons pd,s not good on remaps

The PDs remap really well and you don't need to remove the dpf. A number of people on here have them remapped

I have a remapped Superb PD140 with DPF and the remap transforms the car. As long as the remap takes into account the DPF (A correct one for the car will) then you should have no problems.

The PDs remap really well and you don't need to remove the dpf. A number of people on here have them remapped

Will a remap made any difference to the DPF with regard to town driving. I only do short trips most of the time so I'm beginning to think I should have bought a Petrol Version as the DPF is coming on every couple of months

" Should I have bought a petrol "

"When the DPF light is illuminated, it does not necessarily mean that the DPF requires regeneration. "

Is this a contradiction or what ? If the light is on according to the handbook, I'm sure you'd go through the regen process instead of thinking "oh the light's faulty..?"

"When the DPF light is illuminated, it does not necessarily mean that the DPF requires regeneration. "

Is this a contradiction or what ? If the light is on according to the handbook, I'm sure you'd go through the regen process instead of thinking "oh the light's faulty..?"

I can tell when the DPF light is going to come on

Slight increase of revs on tick over and the cars seems a little sluggish and on it comes. Go through the process of a regen and as soon as the DPF light goes out theres a little kick of the Engine and the car is back to normal

So I don't think the DPF light is faulty

Will a remap made any difference to the DPF with regard to town driving. I only do short trips most of the time so I'm beginning to think I should have bought a Petrol Version as the DPF is coming on every couple of months

" Should I have bought a petrol "

Anyone wish to comment

"Whats a Dealer Forced Regen"

If for any reason the car cannot perform a regen itself the dealer can plug in the diagnostic tool and force the car to run a regen cycle.

I'm not sure if this happens in the workshop or the car has to be driven,

If for any reason the car cannot perform a regen itself the dealer can plug in the diagnostic tool and force the car to run a regen cycle.

I'm not sure if this happens in the workshop or the car has to be driven,

Thanks for that Lou_o............