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dronus Profile
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Date Registered: 08-2008
Location: Adelaide
TOTAL POSTS: 541
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Particulate filter error resulting in MIL light


While driving to the folks place this morning my Particulate Filter warning light came on. Luckily i was heading to the Barossa, so i had a good opertunity to get my speed up above 60 for a while so it could clear out.

Problem is that it didnt clear out and now my engine MIL light is on. I called the RAA but they came out and said that i need to take it back to a Nissan Dealer so they can check it out. If the MIL light starts flashing, i should stop and ask for the car to be towed.

Has anyone had problems like this on the new T31 yet? Its the first time either light has come on (besides startup)

Cheers, and merry xmas


---
Current - GU Patrol
Old - '08 T31 Platinum TL Diesel Manual - Bells and whistles.
Older - '04 T30 Ti-L Auto
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Date Registered: 08-2008
Location: Adelaide
TOTAL POSTS: 541
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Re: Particulate filter error resulting in MIL light


Error code in ScanGague and VitalScan is P1435. VItalScan says its to do with the Air-conditioner, but i think the codes arnt matching up.

Neither will reset the MIL as it comes straight back.

Anyone have the ECU codes for the T31 Diesel? P1435 doesnt appear in the normal T31 ECU codes.

---
Current - GU Patrol
Old - '08 T31 Platinum TL Diesel Manual - Bells and whistles.
Older - '04 T30 Ti-L Auto
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jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29094
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Re: Particulate filter error resulting in MIL light


Dronus,

The T31 Diesel error codes are noted below and error code P1435 and P1436 is the DPF (Diesel Particulate Filter) Regeneration fault

Image

This is a result of too much soot in the filter which may be the cause of driving in low RPMs for a while. Your owner's manual should state something about prolonging the life of the particulate filter or clearing it if the light comes on, usually revving the engine in 2000RPM for 15 minutes would clear the soot and clear the code. If not, take it to the dealer and it will be covered by warranty.

---

25/Dec/2008, 6:10 pm Link to this post Send Private Message MSN Blog
 
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Date Registered: 08-2008
Location: Adelaide
TOTAL POSTS: 541
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Re: Particulate filter error resulting in MIL light


Cool, thanks for the help Jalalski!

I drove back last night and kept the Revs up to try and clear it but to no avail.
Interestingly the cruise control doesn't work now (maybe its because the engine light is on?). The Set light just flashes when you press the On/Off button.

I'm meant to be going to the beach this arvo, I'd better go make sure my 4WD can still be selected!
<edit> 4WD can still be selected, whew! </edit>

NissanCare sends out the RAA here, the guy who came out yesterday didn't have an OBD reader (I ended up borrowing my dads to find that code). I rang them (Nissan Care) again this morning but they explained that unless the car actually breaks down and is un-drivable there is little they can do. I'll take it into the local (not my normal) Nissan Dealership tomorrow when everything opens.

I might do some reading about the DPF - i understand what it does, just curious on how it does it. Things like does it use exhaust heat to burn the soot off, or is it electronic (heater).

Cheers again,

-dronus

Last edited by dronus, 26/Dec/2008, 8:38 am


---
Current - GU Patrol
Old - '08 T31 Platinum TL Diesel Manual - Bells and whistles.
Older - '04 T30 Ti-L Auto
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Date Registered: 07-2008
Location: Perth, WA
TOTAL POSTS: 476
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Re: Particulate filter error resulting in MIL light


Be interested in their findings. What sort of mix of city/highway driving have you done/estimate? How many kms ?

(I am up to 15000 with a 70/30 mix and havenot yet seen the error).

I also tend to leave my engine idling instead of switching on/off as I was used to with a petrol motor.

However my understanding of the Renault/Nissan DPF action and the post injection fuel timing suggests that it should not really matter how the engine is loaded - ie very hot or stopstart driving.

Be interested to know how the error is detected - ie sensors used and their position on the DPF.


John

---
X-916, VW Golf 90TSi manual, limestone grey, no extras
2008 TL dc i, manual, twilight; full set bash plates, jaos strut bar
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27/Dec/2008, 11:04 pm Link to this post Send Email PM   Send Private Message
 
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Date Registered: 08-2008
Location: Adelaide
TOTAL POSTS: 541
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Re: Particulate filter error resulting in MIL light


Howdy John,

Yep im looking forward to learning a little bit more about it too. Xmas has been a bad time for it to happen as nothing is open until Monday! Im guessing all the dealerships will be busy tomorrow but i hope they can squeeze me in for the repairs under warranty.

I am on about 8500km and do mostly city driving - little bit of a run up the expressway at 100km/h hr every now and then. I've taken her up the freeway a couple of times so i guess its not like it never gets upto 100km/h. Plenty of beach driving when i get fishing, which gives a bit of a workout i guess.

I'm the same, i leave mine idling if im not going to be too long, most ppl with diesels seem to do the same..

I had a look under the car in my boredom and saw a heap of sensors and pipes around what im guessing is the catalytic converter.. wonder if they have something to do with it..

Ill find out as much as i can hopefully tomorrow, and post back here.

Cheers,


---
Current - GU Patrol
Old - '08 T31 Platinum TL Diesel Manual - Bells and whistles.
Older - '04 T30 Ti-L Auto
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Date Registered: 08-2008
Location: Adelaide
TOTAL POSTS: 541
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Re: Particulate filter error resulting in MIL light


Car booked in for 2pm at Lakeside (see the servicing/warrenty repairs thread for why im driving 1 hour instead of 15 mins to get it looked at!).

Will post back with details.

-dronus

---
Current - GU Patrol
Old - '08 T31 Platinum TL Diesel Manual - Bells and whistles.
Older - '04 T30 Ti-L Auto
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Date Registered: 08-2008
Location: Adelaide
TOTAL POSTS: 541
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Re: Particulate filter error resulting in MIL light


Ok,

The guys at lakeside had a look and reakon that the Particulate filter is fairly choked up because the particulate filter regeneration has not taken place. They explained that the most likely cause is me no driving the car over 60km/h for long enough for it to take place.

I did a bit of reading about Particulate filters and how they work on diesel cars, and also asked plenty of questions while at the dealership. Have a read of the wikipedia - it explains it mostly.

The diesel X-Trail uses the method where the timing is altered during the specified regeneration process, which allows unburnt fuel mixture to reach the filter (at the front of the catlytic converter) where it burns pretty darn hot, removing the soot. If the regeneration process does not work, the Cat can get blocked up. there are sensors on the front and back of the cat which tell the ECU when there are temperature or pressure differences, triggering a fault. The regeneration process will not take place unless the car is travelling above 60 (read 80) km/h for long enough for it to finish. I was suggested about an hour in my case.
If he regeneration does not take place, or the levels get too high the engine error light comes on. With this light on, it disables the cruise control. If it gets too high, the engine light will flash, and the car will go into limp mode. As its drive-by-wire it rev limits you to 2000rpm.

With all this information on board, and with nothing better to do i set off on a journey up main north road. I reached Blanchtown which is about 120km north of the dealership. i stopped for a chiko roll and a coke, and turned around and headed back to the Barossa (at least another 100 or so km. Most of the km's were done at about 100 - 110km/h apart from the first bit, and some roadworks etc. I had dinner, then head back home via the back way, so about 2 hours, mostly above 80 - 100km/h including a bit long downhill run down the south east freeway.

One would think that the light would be off by now? Over 300km of cruise controlless freewayish driving and the light is still on! A good thing is that my fuel economy dwindles to 6.3L/100 on freeways - moot point!

Lakeside suggested the long run, they also said that if that didn't fix it the next step would be to do a manual regeneration however this would involve having to replace the oil and oil filter as it puts a huge strain on the engine to do it in the workshop. The last option for them is to replace the catalytic converter. All of this i would assume would be under warrenty (they wouldnt confirm). They did however confirm that nothing was loose or damaged under my car so thats good.

Car still drives like new - no noticeable difference in anything.

I would prefer them to either find out why the regeneration isn't taking place, or just replace the catalytic converter before putting all that load on my engine - im not too keen on that!

My gut tells me that there is something wrong with the initiation of the regeneration process - ie it is not being triggered by the ECU. The Mechanic mentioned that they had a the same problem with the D40 Navara when it first came out - and it usually only occurred the first time the regeneration process was polled by the ECU.

The mechanic raised a tech report and sent it off to head office with all the info, he did seem very keen to get this sorted out so i will give him a call later this morning (tuesday). Just thought id jot ll the info down while its fresh in my head.

-dronus

---
Current - GU Patrol
Old - '08 T31 Platinum TL Diesel Manual - Bells and whistles.
Older - '04 T30 Ti-L Auto
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Date Registered: 07-2008
Location: Perth, WA
TOTAL POSTS: 476
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Re: Particulate filter error resulting in MIL light


Hmm - gut feeling says something is not working correctly and not just due to low speed kms.

Out of interest, do you see any black smoke out of the exhaust under hard acceleration. If indeed the DPF is not working, the unburnt fuel must be making its way out somehow. Is the facia around the exhaust sooty?

Dronus - also thinking that if you are regularly reporting sub 7 fuel consumption figures and let's say there is no black stuff coming out of the back, then perhaps a sensor issue?

I only hit the sub 7's on highway driving and typically the meter hangs around sub 8 for the combined cycle.

Wonder if this is saying something, given that you reckon your city driving far exceeds long highway work.


John

Admin Edit: 2 consecutive replies merged. Please use the EDIT button to add or edit your reply if it is less than 24 hours old or if no one has posted a reply to your initial post.



Last edited by jalalski, 30/Dec/2008, 9:38 am


---
X-916, VW Golf 90TSi manual, limestone grey, no extras
2008 TL dc i, manual, twilight; full set bash plates, jaos strut bar
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30/Dec/2008, 7:27 am Link to this post Send Email PM   Send Private Message
 
dronus Profile
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Date Registered: 08-2008
Location: Adelaide
TOTAL POSTS: 541
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Re: Particulate filter error resulting in MIL light


Just spoke with the Tech at Lakeside who i spoke with yesterday (good thing about Lakeside is that you can actually speak with the Mechanics that work on your car!).

I let them know that i had done all those Km last night and the light stayed on. He suggested the next thing to do was the service regen.

I asked that if they do a service regen before investigating the Catalytic converter / DPF, or the components that make up the normal regeneration process that i would insist that they make note of it in my service book in case the extreme load and heat that gets put on my engine and car causes any damage they may bubble to the top later on, outside of warrenty. I understand that they are just following standard procedure.
 
My reason for asking this is two fold.
1. I believe that there is something wrong with the DPF. The 2 trees of paperwork they they printed out from consult show that the ECU, its programs and sensors are all OK. It shows that the DPF is largely blocked which indicates that either regen was too late, or the DPF is faulty. Doing a service regen might not clear the blockage - then i have a worn engine and a new DPF.
2. A friend of mine who is a mechanic advised that if it puts that much load on your engine in an hour that you have to change the oil and oil filter its likely it could do other damage too. Im nearly up for my 10,000km service so i guess it could be done at the same time..

They are happy to write it in my log book but "any issues arising from the service regen may or may not get covered after the warranty, thats up to Nissan".

They are going to put my request into Techlan for the DPF to be replaced instead of the service regen, its upto Nissan to approve or disapprove. Im hoping they approve and just replace the DPF under warranty. if they have to do the service regen ill make sure its noted in the service log book emoticon

Lakeside Service (Tim) and the Mechanic have been very helpful, explaining alot about how it all works. They are very friendly and willing to help, which is awesome.

Ill post back when i hear from Techlan.

Cheers,

Dronus



---
Current - GU Patrol
Old - '08 T31 Platinum TL Diesel Manual - Bells and whistles.
Older - '04 T30 Ti-L Auto
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30/Dec/2008, 9:46 am Link to this post Send Email PM   Send Private Message MSN
 


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