hello
i have a octavia 3 2.0 tdi vrs 2015 and the car have some problems...
It's doing lots of regens. For example i go for groceries (5km road) the car is in regeneration... I always wait the car to finish the regen. When i return home the car is in regen again...
I bought the car 2 weeks ago. I have a vcds and no errors. The regen starts at 24g. No oil lose...
I' ve noticed something strange with the egr vacuum regulator solen.val.2 when i try to do an output test with vcds (aborted safety - reasons)
The actual value of the egr solen val. is always 100%
The value of the low pressure egr valve fluctuates depending of the acceleration, and the test is ok with it. 

In 2 weeks i drove it for aprox 3000 km, and first thing i've changed the motor oil... Now with vcds the oil has poor quality.
Did anyone had this issue?
Any advices?
I went at the loval dealer and told me the car is fine 😭

The regen needs 16km to complete. Also staying still does not help.

Al regens stops each time at 0.50g, 

Have you tested the EGR valve as there is a test on VCDS that checks the operation of the valve. I am not familiar with VCDS or where the test is but it should be on the 01 engine control unit.

i did. the car has 2 egrs. one is low pressure and the other high pressure. the low pressures test was sucsesfull and the othe u can see the result in the upper picture.

1 hour ago, Sec8200 said:

The regen needs 16km to complete. Also staying still does not help.

Does speed (and RPM) above certain point have any effect on the regen speed and time. For example does it matter if i go 120 km/h or 180km/s?

Oil ash volume of 0ml seems very unlikely for a 2015 car. How many miles/km has it covered?

 

It's either a brand new dpf or it might have been cleaned or even removed?

 

The oil quality being poor is normal for a car on fixed services (10k km/1 year). It doesn't mean the oil is bad 🙂

5 hours ago, Sec8200 said:

The regen needs 16km to complete. Also staying still does not help.

 

Are you sure about the 16km?

 

While I was rebuilding my vehicle it was started and left idling many times over a few months, eventually the regen warning light came on, I let it idle till the engine was at operating temp although the oil was not at 90°c, I drove 1km to the M23 and then 3 or 4km at 70 mph to the next exit by which time the regen had already completed and the light extinguished.

 

Maybe 16km at slow urban speeds from a cold start in winter?

@J.R. usually I use the VAG DPF to see the schedule and when it's finished. I've detected it being ~16km, even when driving on B roads.

BTW I've never saw the DPF icon, just the regular regens.. where on idle..its trying and gives up (start stop becomes avail) BUT the icon says regen is scheduled for next start.

@langers2k is right...Oil ash can't be zero. No way, if not brand new.. not sure what is here the issue..

@Motion the RPM does not seem to affect the regen. I've done live stats .. the load of the engine does affect it - like aircon, mostly its affected by hills. There is a say that above certain km/h its doing passive regens (not the actiive we are discussing), but I can't confirm. If you ask me the heat dispersion can be an issue at 180km, can't really advice if there is mechanism to prevent this OR the heat generated is enough for regen.

Edited 26 October, 20205 yr by Sec8200

59 minutes ago, Sec8200 said:

@J.R. usually I use the VAG DPF to see the schedule and when it's finished. I've detected it being ~16km, even when driving on B roads.

BTW I've never saw the DPF icon, just the regular regens.. where on idle..its trying and gives up (start stop becomes avail) BUT the icon says regen is scheduled for next start.

@langers2k is right...Oil ash can't be zero. No way, if not brand new.. not sure what is here the issue..

@Motion the RPM does not seem to affect the regen. I've done live stats .. the load of the engine does affect it - like aircon, mostly its affected by hills. There is a say that above certain km/h its doing passive regens (not the actiive we are discussing), but I can't confirm. If you ask me the heat dispersion can be an issue at 180km, can't really advice if there is mechanism to prevent this OR the heat generated is enough for reg

Why would a heat be a problem. Doesnt the heat help passive regen?

@Motion I've meant the lack of heat. Yes heat is what turns soot to oil ash, you are right.

 

At 180km/h engine produces a lot of heat, but also the wind is a lot. Not sure which is more. This is one of the reasons DPF is possitioned at the far end of the engine bay, closer to the exhausts and far from the cooling wind.

Edited 26 October, 20205 yr by Sec8200

8 hours ago, langers2k said:

Oil ash volume of 0ml seems very unlikely for a 2015 car. How many miles/km has it covered?

 

It's either a brand new dpf or it might have been cleaned or even removed?

 

The oil quality being poor is normal for a car on fixed services (10k km/1 year). It doesn't mean the oil is bad 🙂

That value ( oil ash volume) hasnt changed since i have the car. Tested a vw tiguan 2020 2.0 tdi 150 twice and first time vcds mesured the oil ash volume 3.8665427 and the second time 0.00. I thing in certain conditions that part is showned... I don't know. 

My car has 227.000 km with full service history. 

 

Today i was againt at the local skoda dealer to search for a update soft. But there isn't one. They said again that the car has no faults and they can't diagnosticate the issue, because on the tester the car has none. 

But they admited that is something wrong and they can't figure it out... 

Alsaw the car hasent been softed for power. (stock engine power) 

2 hours ago, Modro said:

That value ( oil ash volume) hasnt changed since i have the car. Tested a vw tiguan 2020 2.0 tdi 150 twice and first time vcds mesured the oil ash volume 3.8665427 and the second time 0.00. I thing in certain conditions that part is showned... I don't know. 

My car has 227.000 km with full service history. 

 

I've never come across the oil ash volume only reporting occasionally.

 

I would suggest you update to the latest VCDS release and if there is still a problem with oil ash showing as 0.00ml, start a thread on rosstechs forum.

I have a post here from 2018 with screenshots.

Failing regens outaide the mentioned km and time for completion, as far as I know can be due to : faulty EGR, faulty fuel injector, faulty pressure sensor

 

 

Update: today i changed my updated soft with the diselgate soft and nothing has changed. 

Yesterday I've noticed: left home with 5.5g  in 15 min it made 6.15 whit cooland at 88 degreeds C, and when the coolant was 90 the amount in the filter jumped from 6.15 to 24.00 and the regen begined again 😭😭😭😭😭

The ECU uses the DPF pressure sensor to estimate the amount of soot in the DPF.

 

Perhaps your DPF pressure sensor is faulty & giving false data back to the ECU.

I've change it

This is the video from 6.14 to 24g in a second

1 hour ago, PipH said:

The ECU uses the DPF pressure sensor to estimate the amount of soot in the DPF.

 

Perhaps your DPF pressure sensor is faulty & giving false data back to the ECU.

 

5 minutes ago, Modro said:

I've change it

Have you checked that the pipes to the pressure sensor are clear? It's not unknown for them to become blocked.

I did checked them. The pipes are clean

The calculated value jumping is probably a failsafe as the measured soot hit 24g and caused the regen.

 

Is the DPF sensor genuine and was it adapted after fitting? The measured value increased pretty quickly which seems strange.

 

I still think the DPF has been messed with or possibly removed, especially on a car with 227000 km with apparently zero oil ash volume. I'd be tempted to find someone to re-flash the ECU with stock software and see what happens...

Something strange is happening there! 

I've addapted the sensor! 

The dpf is there and i made a dpf clean and they told me that the dpf is fine... 

And i was at the skoda dealer and installed the preview version of the car software (diselgare). 

After that the only thing ive noticed wast the increase of the consumption, but not much. 

In Europe, the emissions scandal/diesel gate only effects the older EA189 engines. You have a EA288...

 

All I can suggest is finding a similar but 'good' car and then making similar drives in both to compare various sensor output.

I had the same issue with a CUPA engine? Do you have a CUNA or CUPA?

CUPA does not have 2 EGR, no VVT, only 1 lambda sensor.

Your engine is smoking.

 

1. changed DPF pressure sensor - same issue

2. checked injectors and had 2 over +-1. Changed all of them with injectors from a GTD with 20k km -> issue improved but not fixed

3.cleaned DPF and checked low pressure EGR . Cooler for EGR was leaking and changed that also ->issue improved further but not fixed.

4. checked for recall -> none

5.checked for recall for GTD-> recall for Lambda sensor -> changed lambda sensor and did a recalibration -> issue fixed after 1000km.

 

Bad software engine design that does not throw errors. Recall for VW engines in this case -> 2X34 if i'm not mistaken. After fixing it I sold the car.

My car did this at ~160.000km.