Determine regen status?

[Cougar281]

I've been trying to get my wife's TDI to complete its readiness monitors so it'll pass inspection, and the last one to complete was the 'PM Filter Monitor'. The thing is it still says '0' completed regens, however I'm quite sure it really did regen today because yesterday it was at something like 15g soot load, and when I looked at the status and found the readiness monitor had completed, the soot load was down to 3g, along with when we got off the highway after cruising at 65ish in 5th gear, when we stopped at a light, THE STINK... the smell of regen is AWFUL. Aside from assuming it did a regen based on the soot load values, is there any way to actually know for sure?

 

[JSWTDI09]

If you saw calculated soot load drop from about 15g to 3g, a regeneration definitely occurred. Since you apparently have access to VCDS, measuring block 240 will show you how many miles you have driven since the last regen. This page gives you info on other measuring blocks associated with the DPF and its regenerations.
http://forums.tdiclub.com/showpost.php?p=3593992&postcount=16

Have Fun!

Don

 

[Cougar281]

Yes, that also dropped and is now at 20km since regen and I've driven it 200-300 miles since clearing. It just seems odd that while all other things seem to point to a successful regen, the successful regen count is still 0. I wonder if the ECM considered it only partially successful?

 

[compu_85]

Did you shut the car off before it was done? What were the EGTs when you turned the key off?

-J

 

[Cougar281]

Did you shut the car off before it was done? What were the EGTs when you turned the key off?

-J

I didn't catch those when we stopped, but given that our destination was 10.7 miles from home, and as of the return home, it says it's been 12.4 miles since the regen, it would seem it finished its regen just before we got off the highway. Also, when I shut it down, the fan did not remain running.

 

[joewilhite]

I'm sure it won't go thru a regen at only 15 grams of soot. it normally has to reach a point of being loaded and timers have to be high enough to warrant a region . it does that to keep from overheating the dpf and burning it out. same as any other dpf using engine.
the egt just tells the system that its hot enough for a regen and the soot loads are at predetermined set point for regen. an engine can burn soot to ash while on a normal drive cycle. so yes your ecu is telling you that it did not meet the criteria for a normal regen. and that is good because if the system is working properly it should not go thru regens all the time just when its needed.

 

[meerschm]

I never see that successful regen read anything other than 0

the readiness monitors need to see a regeneration run by the car before they all clear.

http://forums.tdiclub.com/showpost.php?p=4908519&postcount=83

I logged some info and posted the log on the above post.

What year/model is the car? and how many miles?

 

[Cougar281]

I never see that successful regen read anything other than 0

the readiness monitors need to see a regeneration run by the car before they all clear.

http://forums.tdiclub.com/showpost.php?p=4908519&postcount=83

I logged some info and posted the log on the above post.

What year/model is the car? and how many miles?

It's a 2010 with 105k on it. Just replaced the turbo due to a broken shaft about three months ago.

Considering that it appears to have done a passive regen, which is what it's supposed to do, how are you supposed to get it to run an active regen if it's constantly burning soot off before 20g or so?

 

[meerschm]

The car will run an active regeneration when the calculated soot level gets a bit over 16 grams.

you can look at values with the VCDS.

the miles since regeneration will reset to 0

and the requested regeneration will also give you a hint.

http://www.myturbodiesel.com/wiki/dpf-obd-charts/

I put the above info together after a drive in my 09, based on logged values.

Passive regeneration is what drives the measured soot levels down while you drive,

the active regeneration also drives the measured soot down, but also reduces the calculated soot value. it also reduces the requested regen number, and if it completes, resets the miles since regeneration

more than you want to know is in the self study guide.

http://www.natef.org/natef/media/natefmedia/vw%20files/2-0-tdi-ssp.pdf

The readiness values should pass after the car completes an active DPF regeneration.

there should be no need for you to run a service regeneration, initiated with VCDS.

 

[Cougar281]

The car will run an active regeneration when the calculated soot level gets a bit over 16 grams.

you can look at values with the VCDS.

the miles since regeneration will reset to 0

and the requested regeneration will also give you a hint.

http://www.myturbodiesel.com/wiki/dpf-obd-charts/

I put the above info together after a drive in my 09, based on logged values.

Passive regeneration is what drives the measured soot levels down while you drive,

the active regeneration also drives the measured soot down, but also reduces the calculated soot value. it also reduces the requested regen number, and if it completes, resets the miles since regeneration

more than you want to know is in the self study guide.

http://www.natef.org/natef/media/natefmedia/vw files/2-0-tdi-ssp.pdf

The readiness values should pass after the car completes an active DPF regeneration.

there should be no need for you to run a service regeneration, initiated with VCDS.

Thanks - it would seem that it did do an active regen then because it was up to around 16g calculated and that dropped down to 3g or so, and the miles since Regen as well as time and fuel used all dropped. Oddly, it's showing 0g measured soot. Other than that, it seems to be working the way it should be.

 

[meerschm]

that should also have reset the last OBD emissions monitor (assuming you had cleared codes, which also clears the OBD monitor check results)

that measured soot stays around 0 for me for the first part after a regen. creeps up over the cycle.. then back down, then up, then down. but never have seen it get higher than the calculated soot value. (on my car)

 

[Cougar281]

that should also have reset the last OBD emissions monitor (assuming you had cleared codes, which also clears the OBD monitor check results)

that measured soot stays around 0 for me for the first part after a regen. creeps up over the cycle.. then back down, then up, then down. but never have seen it get higher than the calculated soot value. (on my car)

Yes, it did set the 'PM Filter Monitor' to 'Passed' after that regen. As you probably saw in my other thread, the only ones remaining are 'Catalyst Monitor', 'Heated Catalyst Monitor' and 'Oxygen Sensor Monitor' (as displayed by VCDS). And they are being a bear to set. It's been driven probably 600 miles so far and they still haven't set (or set any DTCs). I've tried everything, I even attempted the 'drive 55MPh for 3 minutes then coast to 20' but that was impossible - driving near 55 is near suicide and trying to coast down to 20 without brakes, let alone 0, forget about it. Can't be done on any public road I've been on. You need a circle track dedicated to that nonsense to be able to accomplish it.

 

[joewilhite]

Yes, it did set the 'PM Filter Monitor' to 'Passed' after that regen. As you probably saw in my other thread, the only ones remaining are 'Catalyst Monitor', 'Heated Catalyst Monitor' and 'Oxygen Sensor Monitor' (as displayed by VCDS). And they are being a bear to set. It's been driven probably 600 miles so far and they still haven't set (or set any DTCs). I've tried everything, I even attempted the 'drive 55MPh for 3 minutes then coast to 20' but that was impossible - driving near 55 is near suicide and trying to coast down to 20 without brakes, let alone 0, forget about it. Can't be done on any public road I've been on. You need a circle track dedicated to that nonsense to be able to accomplish it.

try lifting the car and running it that way, worth a shot

 

[Cougar281]

try lifting the car and running it that way, worth a shot

I can't see how that would help. It would spin the wheels, but it would be zero load. Plus I can't imagine letting the wheels spin free and unloaded at that speed is all that good of a thing. Now on a dyno, that would be a different story.

 

[meerschm]

The guy at Raxles said running with the wheels hanging is a terrible idea.

On my car, the last one to reset was the catalyst monitor. the others cleared before the DPF regen.

(but ,my car is a 2009, and did not have the partial emission patch. for some reason they did not release one for the 2009 CBEA)

Might want to run through the basic settings functions, one at a time, and see if they show any other issues.