Sorry for mentioning that word.DPF as I know it is mentioned on a few threads.i am just hoping that someone might have some fresh ideas. 2015 Superb mk11 .Dpf light has come on several times in our nearly 2 year ownership..initially do the regen trip and it would go off...about 2 months ago all three came on...dpf.engine.and glow plug light.

Garage did a forced regen and lights out..within a month all back on.

Last week new dpf sensor fit and glow plugs(computer said 2 and 3 were defective)

Not even a week and dpf light back on.At last visit computer was only showing 9g of soot.

The car is fantastic for our business (run a funeral business) and it is in constant use but this dpf crap is starting to annoy me..I am about to go off to the States for a fortnight and need the car to be ok for my colleague Suzanne because limp mode is not ideal.

We use an independent skoda garage and hoping that someone might have any ideas I can take to them to look at...seem to think I read somewhere about an air intake pipe that may cause issues .Thanks for your help.

Carl

Surely an independent Skoda garage does not need told by the customer what needs doing.  Do customers tell you what you need to do in your funeral business?   Talk to them about what you require, not how to do it. 

It sounds to me like the garage are just firing up the parts-cannon until the issue goes away, they should be doing  a proper diagnosis, especially for a reoccurring fault. 

The ash level is the important one to look at, this isn't combustible therefore isn't removed in the regen process. If the DPF ash levels are high it will have less capacity and will result in the lights coming on. 
If you have high ash levels, you could look at having it chemical cleaned and see what results you get.

 

I'm sure you already know this, but DPF equipped cars aren't the best for short trips/town driving as the soot loading is often heavier and they don't get the chance to complete regeneration cycles or do passive regens.

 

In our business we listen to people's ideas and we give them.ours..thats all I am wanting to do.put some ideas forward that maybe could help.The computer says there is nothing wrong...there clearly is.

Our Skoda doesn't do lots of stop start.we are located in skipton so our journeys are longer than average.iwe have done runs to Pocklington...  York..and then our first slow trip into Bradford...then light comes on..

Thanks for the quick replies.

Hello again Carl,

 

As mentioned by @tootthey should really be able to sort this themselves, but I agree with @MATT0693that it seems they are firing parts at the car.  I will give them the glow plugs, but the DPF sensor shouldn't have been replaced, unless it was given off clearly duff readings (max is 45g, and we had someone recently reading 650g)

 

My own car is a newer 1.6TDI engine, at roughly 145,000 miles and no fault codes.  It does however want to regen all the time, it's driven once a week, and the DPF regen won't stop until it drops to about 5.5g measured.  Yours reading 9g, albeit a momentary reading at that time, means it will want to complete the cycle.

 

The one thing this garage could do is live data logging of soot levels whilst driving.

Thanks for yor reply yet again..Been for a run to Preston on M65 today and eventually dpf light went off so will see how long it stays off.It doesn't do lots of stop start stuff because we are not town based but will give it a good blast once a week..Going off to States on Sunday ready for  Daytona 500 so the superb can wait for its next blast till I get back. 👍

Enjoy the trip away!

 

p.s. what is the mileage on the car now roughly?

76600 

Just now, Carl248 said:

76600 

That should still have plenty of life in the DPF, unless the wrong oil was put in.

Anyhow, enjoy the trip away, and hopefully you can come back in a few weeks to inform us on what's happened with the car since.

Cheers.me and my boy(24) try to do the 500 every couple of years...like an addiction. 🤣🤣

First and foremost me and my lad had a great trip to the Daytona 500 and tried to enjoy the record February temps for Florida of 92 degrees for 4 days..

Anyway back to the dpf issue.. Its been 5 weeks since garage said it was sorted. Whilst away dpf light came on again but my colleague managed to clear it with a run.2 days ago came on again.Today was the day I was to take it for a blast but yesterday all the lights came on again...engine light glow plug etc...since I have been back from the States we have done no slow time runs and I have alot of the time tried to drive between 2000 2500 rpm because this issue is not good to have if we get called out during the night  and have to drive a 50 mile round trip in limp mode.So what next..should I be looking at getting the filter cleaned...The car is great and suits our business but it is starting to wear me down.I keep getting told by some to get the dpf deleted but I would like it to pass its mot's.

I will be back to the garage on Monday morning first and foremost.

 

Cheers 

Best of luck for Monday 🤞

I've been here with my Passat B6 2.0 Tdi, same engine, same set of problems.

 

Long story short. my Passat 2.0 Tdi engine was not the most reliable despite what other's experience might be, maybe I've been unlucky. I've had just about every sensor, the turbo actuator, the EGR valve replaced at points when the DPF and/or EML/Glowplug lights have come on, throwing the engine in to limp mode. I think the only relevant parts that haven't been replaced so far are the injectors and the turbo itself.

 

Eventually I came out the other side and haven't had any problems for a couple of years now, so it really was just a case of successive failures. I've replaced the B6 Passat with a superb 2.0Tdi in the belief that I just had a run of bad luck.

 

I've been running mainly VAG and BMW vehicles for the last 15 years or more. The VAG cars seem to throw a code and go in to limp mode at the slightest thing, the BMWs throw a code, the EML comes on but it doesn't just go straight in to limp mode. I drove a BMW 330d with the DPF light on for 6 months before I worked out what the issue was, didn't have to force a regen, just fixed the issue, it did a regen on its own with no ill affect.

Tryed putting in a dpf cleaner at all?

Waiting for some redex dpf cleaner to turn up tomorrow then going to give it a go..👍

11 minutes ago, Stuart-h said:

Tryed putting in a dpf cleaner at all?

 

I must have cursed it by saying it had been reliable for a while, EML on again, EGR failed again.

 

Quite why a failed EGR has to force the car into limp mode every time is beyond me!  

On 18/03/2023 at 10:20, CzechPassat said:

Quite why a failed EGR has to force the car into limp mode every time is beyond me!  

I think any fault in the engine operation which could impact the engine's emissions has to put the engine into limp mode, even if the engine itself could happily run normally in that state.  This is to force the driver to take notice of the fault and get it fixed.

 

If I remember correctly, this was written into the relevant EU regulations around 2000, with minor tightening-up in the years that followed.

 

From the OP's point of view with EGR and related faults; on common-rail diesel Toyotas, some owners report success with using the higher-spec 'super' diesel fuels.  Don't expect an immediate fix, obviously.  And this might just be helping mask another fault, but it's probably cheaper than having to go out on a high-rev run exclusively to just get the engine really hot.

 

6 minutes ago, CombatWombat said:

I think any fault in the engine operation which could impact the engine's emissions has to put the engine into limp mode, even if the engine itself could happily run normally in that state. 

 

Incorrect but it must create an OBDII code and illuminate the MIL.

It sounds like the OP's car has a fuelling issue rather than DPF. If it's consistently filling up with soot it points to the engine running very rich, and that's where I'd start looking.

On 20/03/2023 at 10:33, CombatWombat said:

I think any fault in the engine operation which could impact the engine's emissions has to put the engine into limp mode, even if the engine itself could happily run normally in that state.  This is to force the driver to take notice of the fault and get it fixed.

 

If I remember correctly, this was written into the relevant EU regulations around 2000, with minor tightening-up in the years that followed.

 

From the OP's point of view with EGR and related faults; on common-rail diesel Toyotas, some owners report success with using the higher-spec 'super' diesel fuels.  Don't expect an immediate fix, obviously.  And this might just be helping mask another fault, but it's probably cheaper than having to go out on a high-rev run exclusively to just get the engine really hot.

 

I'm sure someone did a risk assessment and decided that the risk to life of going in to limp mode at the drop of a hat while negotiating a T junction, entering a roundabout or on-slip joining a motorway was far less than the very marginal environmental impact of an EGR valve not working properly. Of course someone a little more cynical might think it's just a good way of creating more revenue for VW workshops.