Diesel Particulate Filter - DPF

subdiesel · Post by **subdiesel** » Thu May 05, 2011 10:37 pm

Outback Walker wrote:...NRMA attended and applied a diagnostic tool which reported the following fault message " Code 1468, Unknown manufacturer DTC"...

I always appreciate real data...
Diagnostic trouble code P1468 is Oil dilution, which is manufacturer specific. Might cause limp-home mode, don't know for sure.
Known/standard codes can be looked up at http://www.obd-codes.com

Accelerator: All modern cars have drive-by-wire, ECU gets accelerator position by measuring two voltages from accelerator (main + backup). I don't think ECU software intentionally ignores driver flattening the pedal. Real physical hardware has delays. Low boost pressure is one big problem, ECU can't inject max fuel till conditions allow it to (air amount - smoke limit). As said, active regen worsens this issue a lot.

>Previously i had been sitting in 5th gear with the engine spinning between 2100 and 2300 rpm for a good half hour, so why the hell was the engine doing a regen at that point?
IMHO there's no driving style preventing active regen. If ECU thinks DPF needs regen and various conditions are met, it'll happen. I often get regen ON at low power constant speed.
On Euro4 at least I get the impression passive regen isn't (noticeably) working. Exhaust gas temp at 400°C for half an hour, calculated soot level not dropping at all...

Anyone got CAN interface yet? The Tactrix Openport 2.0 device is said to work on Euro5, can log without PC connected, good solution so far. And even though EcuFlash won't work with diesels, it does display ECU software version.

steptoe · Post by **steptoe** » Thu May 05, 2011 10:51 pm

Suthol, from what my small brain understands of fly by wire throttle is the ECU will allow the butterfly to open only when the engine is ready fuelwise, and i suppose all the other ECU sensors are happy for it to occur , in its own time. An absolute PITA in factory LPG Foulcans when the set up gets a bit scratchy, a switch off and restart fixes them for a while.

Maybe swap Wheels with your mate or take him in with you to meet the dealer principal

WNVS2390 · Post by **WNVS2390** » Fri May 13, 2011 10:39 pm

Hi All,
Interesting reading through these posts after my own problems. After 4 petrol Outbacks purchased the diesel in 2009. Initially had no problems with it except stalling as I went around corners & have had it stall for no reason twice but have just learnt to use lower gears & drive it harder. Have done 54K kms in 18mths with lots of highway & dirt road driving. Started getting the particulate filter light flashing at 20K & more recently have 4 flashing lights on the dash. My nearest dealer is 2hrs drive away. They have been helpful & reset it several times but today they placed a "computer patch" from Subaru into it. Will just have to wait & see how it goes.
It's a shame because the vehicle is great to drive & very economical

MY11OBD · Post by **MY11OBD** » Thu May 19, 2011 5:44 am

Has anyone noticed Diesel Extra at Shell stations? I filled up with this and did some google and it revals this fuel may help to reduce particulate matter... maybe worth while seeing if this will help in Dpf and shudder issues? so far car is more responsive and runs quiter.

littlewhiteute · Post by **littlewhiteute** » Thu May 19, 2011 6:04 am

So Subaru has released a new ECM program?

suthol · Post by **suthol** » Thu May 19, 2011 8:02 am

littlewhiteute wrote:So Subaru has released a new ECM program?

It would be nice to get a call to invite me in to get this resolved.

To say nothing about getting the two replacement glowplugs and the fuse for the ECS that has now been outstanding for three weeks.

I got chopped in the traffic on the way to the office this morning and it would have been interesting to see what Mr Subaru said if I had hit the bloke and heaped the accident onto him because the ABS/ECS is disabled due to the lack of a fuse.

steptoe · Post by **steptoe** » Thu May 19, 2011 12:26 pm

someone with a wig may think you should not be driving the car knowing something of the safety side is not functional

littlewhiteute · Post by **littlewhiteute** » Thu May 19, 2011 7:21 pm

suthol wrote:It would be nice to get a call to invite me in to get this resolved.

To say nothing about getting the two replacement glowplugs and the fuse for the ECS that has now been outstanding for three weeks.

I got chopped in the traffic on the way to the office this morning and it would have been interesting to see what Mr Subaru said if I had hit the bloke and heaped the accident onto him because the ABS/ECS is disabled due to the lack of a fuse.

There is no way I would give you a car back with non-functioning ABS.

suthol · Post by **suthol** » Thu May 19, 2011 8:02 pm

littlewhiteute wrote:There is no way I would give you a car back with non-functioning ABS.

My sentiments but I was interstate when my son picked it up and I will be having a robust conversation with them in the morning.

I must say though that the brakes do have much more feel with the crap turned off.

Scotty · Post by **Scotty** » Mon May 23, 2011 4:25 pm

Hi

I have just clicked over 60 000km on my 12month old Outback Diesel. Only had the light come on once, did the a 30minute drive and that fixed it. Never had a problem since.

Scotty

suthol · Post by **suthol** » Mon May 23, 2011 6:16 pm

OK, latest update.

The glowplugs have been held up by the devastation in Japan and the reason that the ABS / ECS fuse hasn't been replaced is because the glowplugs are shorted.

Bits due to arrive in Oz on 30/5, the day I will be towing around 750 Kg down to Goulburn.

So we have what in reality is a minor engine problem that takes the vehicles stability systems out of play.

Not clever design.

teye · Post by **teye** » Tue May 24, 2011 10:14 pm

https://subdiesel.wordpress.com/tag/dpf/

teye · Post by **teye** » Tue May 24, 2011 10:15 pm

Make that dpf in iPad language

Gannon · Post by **Gannon** » Wed May 25, 2011 9:01 am

suthol wrote: The glowplugs have been held up by the devastation in Japan and the reason that the ABS / ECS fuse hasn't been replaced is because the glowplugs are shorted.

Like i said in the other diesel thread, the glow plugs shouldn't really be an issue once it is up to operating temp.

Plus, why would they put an engine component (glow plugs) on a ABS/ESC fuse.
Are they telling you porkie pies?

Diesel OB · Post by **Diesel OB** » Tue May 31, 2011 9:17 am

Hi There,

After reading through the info about the new "Lemon Laws" see post regarding driver train shudder, it is looking like we would not have to go down the path of legal action.

According to this if they can not fix the issue we just return the vehicle to the selling dealer for a refund or replacement. Has anybody actually tried this yet? And if so what was the outcome???

Phil

steptoe · Post by **steptoe** » Tue May 31, 2011 2:26 pm

Glow plug fuses on old Toyotas are around the 80A rating and a fuse circuit all on their own. Seems odd to mix other non related electronic circuits of a much lower I expect rating with one that is as high as 80A

Diesel OB · Post by **Diesel OB** » Thu Jun 02, 2011 4:38 pm

Hi All,

Just thought I would post another update!!

After dropping the oil to the correct level after another overfill at the last service have not had any signs of problems.

We have just completed a holiday to Qld and did 5500 kms in 14 days. The oil level did not move and even better we averaged 45.3mpg for the trip. one stretch of 1020kms... loaded to the hilt with all the gear you need to take with a 3yo and a 12 month old, up hill down dale 100km/h and 110km/h- even a couple of laps of Bathurst on the way back down!!!

Fingers crossed it will keep performing this way.

From now on I will not be leaving the dealer until I have run the car and checked the oil and have them correct if needed instead of me having to do it and I would encourage anyone else having issues to check theirs as well.

We never had any issues until the first service!!

Phil

suthol · Post by **suthol** » Fri Jun 03, 2011 8:22 am

Well the parts have finally arrived and the car is in to have the replacement glowplugs and fuse fitted plus the 25K service, it will be interesting to see what difference it makes if any.

On Monday I towed the race car to Goulburn and back without any issues apart from the consumption going from 6.4 to 7.6 per 100.

I've been paying attention to being in the right gear at the 2000 rpm mark if I hit a hill, as a result of this the consumption dropped from 7.4 to 6.4 in the daily grind from Sutherland to Nth Ryde and back.

I'm driving to Brissie and back in a few weeks time so it will be interesting to see how it goes on that one. I'm really starting to think that it needs to be driven like a small petrol engined car rather than a big diesel truck for it to work properly.

Watch this space.

StrontiumSteel · Post by **StrontiumSteel** » Fri Jun 17, 2011 9:38 pm

suthol wrote:...
Watch this space.

Hi there. Been watching. Any update? How was your trip?

suthol · Post by **suthol** » Thu Jan 19, 2012 7:15 am

StrontiumSteel wrote:Hi there. Been watching. Any update? How was your trip?

Time for an update.

The trip to Brisbane was brilliant and on the trip back I filled up near Rochdale and again at Wahroonga just off the freeway, took just over 57L so pretty happy with that.

Also did a trip to the Barossa and back with the clubbie on a trailer, once again ran like a dream and returned around 9L/100. ( see No. plate thread for a couple of pics )

I've done around 20,000 since the glow plugs and fuses were replaced along with a decent service, now have just over 40,000 on the clock.

Yesterday 18/01/12 the DPF light started flashing again on the run to Nth Ryde in the morning, doesn't last the entire trip and there's no obvious loss of power when / if it does a regen.

I only use BP and as a rule always from the same high volume servo at Padstow but did put one tank in from my local last week.

Is it one bad tank, is it the warmer more humid weather. No idea but will see what happens over the next week or so.

One thing I noticed this morning was a smell of raw diesel but this was in traffic so could be coincidental.

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