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  #25  
Old 03-27-2014, 06:53 PM
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Re: DEF Filter Warnings

Just how often does the DPF need to cycle under normal driving? every 100 miles? 200? 500? is summer better than winter for it? if you mix some hwy with some city driving, does it try to clean itself every chance it gets while on the hwy or only when it is purposely getting full? My driving will be primarily in town say 150 miles a week but it will have occasions once or twice a week to be driven at interstate speeds for 20 -30 minutes... does that sound like a life cycle that will be problematic for it?
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  #26  
Old 03-27-2014, 07:41 PM
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Re: DEF Filter Warnings

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Originally Posted by Stbentoak View Post
Just how often does the DPF need to cycle under normal driving? every 100 miles? 200? 500? is summer better than winter for it? if you mix some hwy with some city driving, does it try to clean itself every chance it gets while on the hwy or only when it is purposely getting full? My driving will be primarily in town say 150 miles a week but it will have occasions once or twice a week to be driven at interstate speeds for 20 -30 minutes... does that sound like a life cycle that will be problematic for it?
I can see mine regen by watching the exhaust temperature. I drive the same 110 mile roundtrip stretch every week or two and it almost always regens somewhere during that trip. My guess is that it attempts a regen whenever the DPF has more than an acceptably low amount collected. I have no idea what percentage this is. I've never seen a DPF message. There is a backpressure sensor on the outlet of the DPF and possibly one in the inlet side. The pressure difference is the indicator of how full it is. I wish I could see these values.

Also, I have seen the temps rise to nearly 1200F in town but would abort on its own when I slowed down so it does attempt a regen in town...but we have some 4 lane "streets" where 50+ mph are reached regularly.
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Old 03-28-2014, 05:15 AM
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Originally Posted by ExcursionDiesel View Post
I can see mine regen by watching the exhaust temperature. I drive the same 110 mile roundtrip stretch every week or two and it almost always regens somewhere during that .
What temps are you seeing? I have a wi-fi OBDII thing and a couple of iPhone apps for it but have not messed with it much.

8k miles on mine and no warnings of any kind.

I drive 1 mile to kids' babysitter, idle 10 min while I take them in, then 3 miles of 'stop and go' followed by 7 miles at 55-65 every morning, then back home in the evening (with no babysitter).
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  #28  
Old 03-28-2014, 09:53 AM
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Re: DEF Filter Warnings

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Originally Posted by amr40509 View Post
What temps are you seeing? I have a wi-fi OBDII thing and a couple of iPhone apps for it but have not messed with it much.

8k miles on mine and no warnings of any kind.

I drive 1 mile to kids' babysitter, idle 10 min while I take them in, then 3 miles of 'stop and go' followed by 7 miles at 55-65 every morning, then back home in the evening (with no babysitter).
I see 1200F during regen and 450-900 during non-regen. 650 on flat cruise. All +/- 50 and measured at the DPF. The Android Torque app can read EGT on the engine side if the turbo. It can go to 1300+ under full throttle and changes rapidly. The DPF temp changes slowly...more of an average.
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  #29  
Old 03-28-2014, 10:31 AM
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Re: DEF Filter Warnings

It took a 35 minute burn and filter is clean. Ordeal is over with.

Dealer said the car actually had some other codes (EGR) [No CEL] that were in the system before the filter read full and was a present and contributing factor.

They also said they updated the ECU and PCM.
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Old 03-28-2014, 05:32 PM
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Quote:
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I see 1200F during regen and 450-900 during non-regen. 650 on flat cruise. All +/- 50 and measured at the DPF. The Android Torque app can read EGT on the engine side if the turbo. It can go to 1300+ under full throttle and changes rapidly. The DPF temp changes slowly...more of an average.
I'll start watching mine - around town seems to stay in the 450-650 range



image-376459305.jpg
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Old 04-01-2014, 07:05 AM
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Today I was on city streets for about 10minutes then got on a 60mph road for about 5 miles.

I checked the temp just before I got off of the 60mph road and it was showing this.



image-3261271005.jpg


I hit stop and go city traffic for another 5 min before I got to my office and it stayed about like this



image-605478826.jpg

When I stopped I got out while it was still running and could smell the burning/stink I've gotten before (really notice it in garage)

I guess I do go into regen - but there are no indications from the dash - I went through all the menus today.
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  #32  
Old 06-08-2014, 03:05 PM
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Re: DEF Filter Warnings

Having similar problems. Filter was full at 3500 miles, never saw regen mode despite enough highway driving. Got filter cleaned a week ago by dealer and already back in limp mode despite nearly an hour of highway driving today. Never did see it in regen mode, just went from nearly full to full/limp. Very frustrating.
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  #33  
Old 06-08-2014, 03:12 PM
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Re: DEF Filter Warnings

As has been documented here, there is no regen indication under normal operation. The first warning is your last chance to drive and regen. Don't ignore it.
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  #34  
Old 06-08-2014, 03:35 PM
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Re: DEF Filter Warnings

Thx. What I meant was I've never seen the regen in progress screen despite highway driving. In any case, a full filter one week after cleaning by the dealer suggests a problem.
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Old 06-09-2014, 09:02 PM
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Re: DEF Filter Warnings

Quote:
Originally Posted by ExcursionDiesel View Post
As has been documented here, there is no regen indication under normal operation. The first warning is your last chance to drive and regen. Don't ignore it.
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Originally Posted by Rblnr View Post
Thx. What I meant was I've never seen the regen in progress screen despite highway driving. In any case, a full filter one week after cleaning by the dealer suggests a problem.
We have ours GC Limited regenerating twice in city driving. First time happened at 217 mile mark and say to keep driving so I took it on the highway and took 15 miles driving for the other message to come up and say that the regeneration is completed. Second time happened when my wife was driving it and it was around 720 miles mark. This time she was in downtown coming home and called me not sure what to do since I told her that needs to be driven at highway speed. We have to attend our son kindergartner party so I told her to come home and not to worry about it. she pick me up from home and by the time we get to the school, which is mile away message pop up and it says that regeneration is completed - it took 4 miles in stop and go traffic.
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  #36  
Old 06-09-2014, 09:18 PM
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Re: DEF Filter Warnings

Good to hear how it's supposed to work. Highway driving after the notice has never produced the regen complete notice. Just dropped the GC off at the shop a few hours ago.
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