OK, had a MIL on in my Scout last night, scanned the car with VCDS this morning and from the result below I guess the G450 is on its way out.

 

Can anyone let me know the exact location of the G450 pressure sensor on an 08 BMM engine Octavia Scout please?

 

Many thanks.

 

-------------------------------------------------------------------------------
Address 01: Engine        Labels: 03G-906-021-BMM.clb
   Part No SW: 03G 906 021 SS    HW: 03G 906 021 AB
   Component: R4 2,0L EDC G000SG  1302 
   Revision: --H08---    Serial number: SKZ7Z0H4763111
   Coding: 0000172
   Shop #: WSC 73430 000 00000
   VCID: 020FCDAB5D7EE12E68-8056

1 Fault Found:
001139 - Exhaust Pressure Sensor 1 (G450)
               P0473 - 000 - Signal too High - Intermittent
             Freeze Frame:
                    Fault Status: 00100000
                    Fault Priority: 2
                    Fault Frequency: 2
                    Reset counter: 255
                    Mileage: 240711 km
                    Time Indication: 0
                    Date: 2000.00.00
                    Time: 17:48:49

             Freeze Frame:
                    RPM: 1260 /min
                    Speed: 30.0 km/h
                    Load: 0.0 %
                    Voltage: 14.14 V
                    Mileage: 250 km
                    Temperature: 474.0°C
                    Absolute Pres.: 1744.2 mbar

Readiness: 1 1 0 0 0

See post #34, it went on my 2008 Scout too.

 

http://www.briskoda.net/forums/topic/330034-frequent-dpf-regen-and-error-code/page-2

 

Luckily it is one of the easiest to reach, open the bonnet and it is up against the back of the bulkhead near the silver foil pouch.

 

I think it is G235 that is the real pain on the Scout as it is down in the DPF / turbo area, the prop shaft on the Scout makes it a real chore to reach and remove.

 

Here is the G450, just under the red arrow attached to the silver bracket (this was on my PD170 vRS (it went on that car too!), but it is in a very similar place on the PD140 Scout...

 

Edited 16 April, 201610 yr by silver1011

When it's replaced it must be adapted, just as a heads up.

When it's replaced it must be adapted, just as a heads up.

 

Yup you cannot just swap it otherwise you could end up needing to replace it again.

 

Adaptation is required because the car needs to relearn how full the DPF really is from scratch, otherwise you could get a blocked DPF and/or it will regen a lot unnecessarily. 

Thanks for that Silver, will have a look for it tomorrow.

Thanks for the heads up on the adaption of the new part guys, I have done a bit of reading up and am prepared for this element.

I wonder if I have the US or Malaysian version? 8 years and 150k seems a long time for the US one to last from what I've read.

Thanks for the help guys, got a pressure  sensor from TPS and fitted it last night, bit of a faff getting the hoses off the old one but was successful with a bit of perseverence.

 

The old sensor was indeed a made in US one which amazingly has lasted 8 years and 150k miles.

 

I adapted the sensor which I assume was sucessful as nothing indicated otherwise, and immediately got the DPF warning light on and a message in maxidot to follow DPF instructions in manual. So this morning I triggered a regen on the way to work and got the DPF load coeficient down to 1.2% (I assume this refers to the soot loading as it went down steadily from around 58.6 down to 1.2). The DPF light went off I think around 10 or 12%.

 

The only concern I have now is that VCDS reports a Particulate Filter Carbon Mass of 58.0 which I assume is the ash content of the filter. I believe the maximum is 60.0 which would suggest I only have around 5000 miles till my DPF is full (I guess this is to be expected at 150k miles?). Does this sound correct? If so I will start saving for its removal now.

Sounds about right, usually they are getting full around the 100k mark

Isn't the 58% carbon what you've just removed? Seems a big coincidence that 58 is the number both times? And while soot is mostly carbon, ash isn't, it's everything left after all the carbon's all been torched off? :wonder:

Isn't the 58% carbon what you've just removed? Seems a big coincidence that 58 is the number both times? And while soot is mostly carbon, ash isn't, it's everything left after all the carbon's all been torched off? :wonder:

The soot is measured in % but ash is in g on the pre FL cars. Probably just a coincidence.

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Could someone explain how to do the adaptation.

Probably explains why I go through regeneration more than I think I should be.

Could someone explain how to do the adaptation.

Probably explains why I go through regeneration more than I think I should be.

The adaption is only needed when fitting a new sensor. If you fitted a new one and didn't do the adaption then you have a problem. I don't think doing the adaption later would help anything.

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The soot is measured in % but ash is in g on the pre FL cars. Probably just a coincidence.

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OK, but why would ash be described as carbon, when it isn't?

OK, but why would ash be described as carbon, when it isn't?

The ash will be predominantly carbon. It's just whatever the engineers decided to call it.

It's measured in ml on the CR diesels.

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Think we'll have to agree to disagree on that. Ash is ash cos it doesn't burn, carbon does.

Think we'll have to agree to disagree on that. Ash is ash cos it doesn't burn, carbon does.

But not all carbon containing compounds do, at least not at the temperatures in the dpf (up to 800 degrees C during a regen). You also are assuming sufficient oxygen is available for complete combustion in the time available.

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Thanks for the help guys, got a pressure sensor from TPS and fitted it last night, bit of a faff getting the hoses off the old one but was successful with a bit of perseverence.

The old sensor was indeed a made in US one which amazingly has lasted 8 years and 150k miles.

I adapted the sensor which I assume was sucessful as nothing indicated otherwise, and immediately got the DPF warning light on and a message in maxidot to follow DPF instructions in manual. So this morning I triggered a regen on the way to work and got the DPF load coeficient down to 1.2% (I assume this refers to the soot loading as it went down steadily from around 58.6 down to 1.2). The DPF light went off I think around 10 or 12%.

The only concern I have now is that VCDS reports a Particulate Filter Carbon Mass of 58.0 which I assume is the ash content of the filter. I believe the maximum is 60.0 which would suggest I only have around 5000 miles till my DPF is full (I guess this is to be expected at 150k miles?). Does this sound correct? If so I will start saving for its removal now.

The MOT test will soon be changing to include a test for diesel particulates and soot. This test measure the effectiveness of your DPF and your vehicle will fail it’s MOT if you’ve been naughty. Supposed to be a crackdown planned for 2016/2017. The government are also thinking along the lines of ved evasion and void insurance on this issue. Still some way to go here and no im not wanting to start a "bun fight " but might be worth some careful consideration before reaching for the angle grinder.

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Ash is primarily metallic compounds (oxides, sulphates phosphates) according to here, and here. Not trying to be argumentative with you trundlenut, just keen to understand whether the OP is worrying unnecessarily because the info he's basing his worry on isn't what he thinks it is.

I'm not ruling out that it's mis-labelled in the software though, as you suggest.

Ash is primarily metallic compounds (oxides, sulphates phosphates) according to here, and here. Not trying to be argumentative with you trundlenut, just keen to understand whether the OP is worrying unnecessarily because the info he's basing his worry on isn't what he thinks it is.

I'm not ruling out that it's mis-labelled in the software though, as you suggest.

Fair enough.

Vcds is pretty clear as to what is soot and ash, there are four values displayed under the measuring block with labels, so hard to mix up.

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Fair enough.

Vcds is pretty clear as to what is soot and ash, there are four values displayed under the measuring block with labels, so hard to mix up.

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They didn't seem that clear to me, what lables exactly should I be looking for? And in which measuring block? I was using 070, 075 and 068.

The reason I linked the particulate filter carbon mass to ash was that the figure didn't change during the regen, whereas the load coefficient went steadily down, which seemed about right...

They didn't seem that clear to me, what lables exactly should I be looking for? And in which measuring block? I was using 070, 075 and 068.

The reason I linked the particulate filter carbon mass to ash was that the figure didn't change during the regen, whereas the load coefficient went steadily down, which seemed about right...

What version of vcds are you using and does it have the correct label file for you engine controller?

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What version of vcds are you using and does it have the correct label file for you engine controller?

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Hi Trundlenut, VCDS version is 15.7.4 with Data version 20160216. How do I tell if it has the correct label file?

 

Has anyone experienced a full DPF? what should I expect to happen once 60g is hit, does the car throw up a fault and drop into permanent limp mode or just refuse to carry out any more regens until the DPF fills with soot? or does it just carry on but  start to run rough due to an ash clogged DPF?

 

I belive the options I will have available are:

1. A visit to shark to have the DPF internals removed and mapped out - downside is rumoured possible future MOT issues.
2. Replace DPF with an aftermarket part such as http://www.ebay.co.uk/itm/Skoda-Octavia-Scout-2-0-TDi-DPF-Particulate-Soot-Filter-140-BMM-Estate-10-06-/400911845101?fits=Car+Make%3ASkoda%7CModel%3AOctavia&hash=item5d583546ed:g:NwYAAOSwPhdVQw~B at £655 plus fitting - Downside is performance of aftermaket filter is unknown.
3. Replace DPF with OEM Skoda unit - Downside likely big money, circa £1200 to £1500
4. Have the DPF professionally cleaned - downside is performance of filter after cleaning tends to be hit and miss as these filter (Unlike truck DPF's) are not designed to be cleaned out.

So lots to think about here. :think:

Hi Trundlenut, VCDS version is 15.7.4 with Data version 20160216. How do I tell if it has the correct label file?

Has anyone experienced a full DPF? what should I expect to happen once 60g is hit, does the car throw up a fault and drop into permanent limp mode or just refuse to carry out any more regens until the DPF fills with soot? or does it just carry on but start to run rough due to an ash clogged DPF?

I belive the options I will have available are:

• A visit to shark to have the DPF internals removed and mapped out - downside is rumoured possible future MOT issues.
• Replace DPF with an aftermarket part such as http://www.ebay.co.uk/itm/Skoda-Octavia-Scout-2-0-TDi-DPF-Particulate-Soot-Filter-140-BMM-Estate-10-06-/400911845101?fits=Car+Make%3ASkoda%7CModel%3AOctavia&hash=item5d583546ed:g:NwYAAOSwPhdVQw~B at £655 plus fitting - Downside is performance of aftermaket filter is unknown.
• Replace DPF with OEM Skoda unit - Downside likely big money, circa £1200 to £1500
• Have the DPF professionally cleaned - downside is performance of filter after cleaning tends to be hit and miss as these filter (Unlike truck DPF's) are not designed to be cleaned out.

So lots to think about here. :think:

In the vcds log, at the start of each section it should say what label file is being used, or it says missing if there isn't one. I would have thought it would be there if you are using the latest version.

What year is your car and what is the engine code?

I checked my car last night, and the dpf is showing 50g of ash. At this rate it will hit 60g at about 145k miles.

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In the vcds log, at the start of each section it should say what label file is being used, or it says missing if there isn't one. I would have thought it would be there if you are using the latest version.

What year is your car and what is the engine code?

I checked my car last night, and the dpf is showing 50g of ash. At this rate it will hit 60g at about 145k miles.

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Thanks trundlenut, I will check for the lable files next time I get a chance to plug it in.

 

Car is a 2008 BMM engined PD TDi.

 

I'm probably not far out from you then if I have 58g at 150k miles.

Thanks trundlenut, I will check for the lable files next time I get a chance to plug it in.

Car is a 2008 BMM engined PD TDi.

I'm probably not far out from you then if I have 58g at 150k miles.

It should have the label file, I have the same engine and I'm using the same version of vcds as you.

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