DPF Light on

[VrsMule]

Just been quoted £2k by a local VAG indy to change the DPF !!!!!! (say it has to come from Skoda). What are the options for cleaning or replacing ? (P.S not interested in removing).

[VrsMule]

Any-one used www.catman.co.uk ? They are quoting £488.85 delivered for the DPF.

[trundlenut]

Dpfcleanteam in Hinckley charge £250 +vat to clean it but you have get it removed from the car.

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[VrsMule]

Is there any way to lower the ash content as I'm currently at 58.8 g !!

[trundlenut]

Is there any way to lower the ash content as I'm currently at 58.8 g !!

Get it cleaned out.

Dpfcleanteam in Hinckley charge £250 +vat to clean it but you have get it removed from the car.

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[Dread1977]

Get someone with VCDS to plug in and do a forced regen and go for a drive.. mine wasnt far off yours when my sensor was screwed and everyone was saying it needed replacing etc etc, the only reason they say this is due to a few cars having caught fire when the ash content was so high.. they are few and far between and never had an issue doing mine, mate plugged his laptop in and we went for a slowish drive 40 mph in 3rd gear seems to work best and I just watched the content drop down at a serious rate before limp mode went off and full power returned..

 

Worth noting you can see the exhaust temp whilst doing this so if it gets too hot just stop and let it cool down!

[silver1011]

The issue I had was that regens and forced regens cleared the light temporarily, but it soon cam back on again.

 

Once the DPF is full of ash clearing the filter is only a temporary or short term fix.

 

The only real solution is to...

 

1) Clean it out - doesn't last long.

2) Remove it - causes issues come MOT time and with insurance.

3) Replace it - costs upwards of £1,200.

[VrsMule]

4)get rid of the car

[Dread1977]

Just checked through this thread and had seen the G450 pressure sensor being mentioned, did you ever change this? if not then it would explain why you keep getting regens happening as the sensor cant tell how full the DPF is and it will default to attempting 10 regens during a certain drive cycle, if this fails you will get the flashing coil, DPF light on and limp mode...

 

 

Get the sensor replaced then do a forced regen!

[VrsMule]

Sensor has not been changed, never had glow plug light or limp mode , only dpf light which clears with a drive in 4th 2000/2500 rpm. Looking at VCDS the system seems to be functioning correctly , % level drops off after re-gen , but loading in g slowly keeps accumulating.

[VrsMule]

For info hasn't attempted a regen or had the light on for over a month now.

[VrsMule]

Update , took the car to a specialist and had the dpf cleaned. 2 doses of cleaner/re-gens and a workshop full of black smoke and the figures reduced to 4% and 0.07g (from 39% and 65.32g). Drove the car , mpg was up by about 6mpg, car driving noticeably better and the exhaust tone was different. Covered 50 miles and the revs were up at idle , drove another 10 miles and the DPF light came on followed shortly by the glow plug and EML lights, car in Limp mode. Obviously perturbed by this I went back to the specialist. On investigation it turned out that the previous owner had been adjusting the map of the ecu (specifically the dpf sensor triggers) and the thought is by cleaning and re-setting everything the parameters are now incorrect. The original map was provided by skoda , loaded and the car now runs properly but the dpf light won't go out. The thought is that the "bounds" need adjusting and this has to come from Skoda. No fault codes are logged , the car runs correctly etc but on checking the levels the % reads 117%. The g level is 0.09g. Is there anyway to reset the counter for the Dpf with VCDS (I.e make it think it has a new dpf) as I think the light must be on due the high % ?

[silver1011]

I commend your determination.

 

The previous owner has been fiddling with the DPF parameters in the ECU? This sounds dodgy to me. Why would they do that?

 

Hopefully a factory reset of the ECU would cure things - if it's possible...

[scumspawn]

Yes you can tell the ECU that a new DPF has been fitted with VCDS. Go to 'Engine Control Module' then 'Adaptation'. From the drop down menu chose 'Carbon Mass' and follow the instructions.

 

Hope this helps.

 

Tim

[VrsMule]

Right , after today's driving % was at 133% !! Reset as per above , went to 20% , drove 2 miles and had risen to 54%. There are no other lights and the car drives as expected. Any ideas ? There are no fault codes, regen shows 3 failed , 4500s since last regen. Constant DPF light.

[VrsMule]

Would disconnecting the battery overnight clear the constant DPF light ?

[silver1011]

I doubt it, worth a shot though.

 

It sounds to me as though whoever has messed with the parameters in the ECU has caused these non-standard issues.

 

The very fact that the DPF light is illuminated but there is no fault code logged is very unusual.

[VrsMule]

The map is back to the standard though, supplied direct from Skoda.The Loading % goes up massivly after only a couple of miles, but there are no fault codes or other warning lights/engine problems ? It's very strange.

[RJMcLean]

Sounding more and more like new DPF time

[Huskoda]

Have you told the ECU it has had a 'new' DPF fitted yet? I don't see that in anything you've done.

[VrsMule]

Yes, told it that yesterday, figures drop to 20%, 0g and 0%. Enter the login to enable service regen but it still just rapidly rises and the light stays on.

[VrsMule]

Got her booked in on Monday to get checked out at a VAG specialist. Then I'll have to decide what to do re the cost of getting it cleaned which seems to have destroyed it !

[silver1011]

I think the DPF might have already been close to death prior to the clean. Cleaning it must have finished it off...

[VrsMule]

Hello Briskodians !! So , back to the "specialists" complete ECU software custom install for my car supplied by Skoda carried out, their take if there is no fault code with this then you need a new DPF , sensors and ECU !! Ignition on all 3 lights now......but a fault code , DPF bank 1 trap out of specification. Leading us to believe the tampered with ecu software/map was to get the lights out on a non OEM DPF (has only done 20k). Anyway with a firm fault I was ready to admit defeat and she was going in for a £2k DPF cx on Monday. On the way home in limp mode I thought "I wonder". So I pulled over , cleared the fault code , reset the counters and entered the DPF regen code. The EML extinguished leaving the flashing coil and DPF lights , set off and 3-4 miles later all lights out !! Drove 130 miles home , mpg on A road 50-70 in traffic 56 mpg ( up from low 40's) and punchier through the gears. Got home no lights , no fault codes !! Needless to say cancelled DPF cx at the mo as it looks promising !!

[Huskoda]

Nice that it looks clear. I can certainly see why people just hoik the damn things out.

Sadly, this will happen again when petrols start being fitted with them for Euro 6.