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dieselgirl 03-18-2014 12:40 PM

2014 Grand Cherokee Diesel
 
New to this site in hopes for some answers!! I bought in December the new diesel engine. I have 2690 miles on it and my n DPF filter won't regenerate itself. The light has come on at least 6 times. I live in a small town and two dealerships are stuck on why my light keeps s coming on. Any ideas or suggestions?!

Willx 03-18-2014 01:42 PM

Re: 2014 Grand Cherokee Diesel
 
Quote:

Originally Posted by dieselgirl (Post 993587)
New to this site in hopes for some answers!! I bought in December the new diesel engine. I have 2690 miles on it and my n DPF filter won't regenerate itself. The light has come on at least 6 times. I live in a small town and two dealerships are stuck on why my light keeps s coming on. Any ideas or suggestions?!

Need a little more info to help. You get the image in the display that says you need to drive in order to regenerate the system?

Like This?... Just asking, or maybe you can describe which light? Also what is your normal driving routine?

http://i875.photobucket.com/albums/a...ps3cba8111.jpg

dieselgirl 03-18-2014 02:07 PM

Re: 2014 Grand Cherokee Diesel
 
That's the exact light. I drive roughly 30 miles a week. I live about an hour from any bigger city so I try to take it once a week to the city and back. The first time the light came on was at about 900 miles on the engine. It's come on numerous times since then. I've changed to Mopar DEF fluid and spent hours in the dealership. I don't know what to do and I'm paying my payments on something I can not enjoy :mad:

Willx 03-18-2014 02:29 PM

Re: 2014 Grand Cherokee Diesel
 
Quote:

Originally Posted by dieselgirl (Post 993622)
That's the exact light. I drive roughly 30 miles a week. I live about an hour from any bigger city so I try to take it once a week to the city and back. The first time the light came on was at about 900 miles on the engine. It's come on numerous times since then. I've changed to Mopar DEF fluid and spent hours in the dealership. I don't know what to do and I'm paying my payments on something I can not enjoy :mad:

If you only Drive 30 miles per week, this will be normal. All Diesel Engines with a DPF Filter need to be run at highway speed for at least 10-15 minutes when hot in order to burn off the ash that ends up in that filter. If you wanted you could ask the dealer to plug in the WiTech and look at the number of regenerations that have happened and I am willing to bet it is more than several hundred. Every once in a while your driving habits don't meet the specifications for what is needed to properly burn off the DPF... Also this is not related to your DEF Fluid, which is to combat NOX in the system, I don't know why they would have gone that route.

Anyway, I can drive 300 Miles in a day or sometimes I drive 3 miles a day for a week. If I keep driving short distances over numerous days and especially if I combine that with lots of remote starts, it will give me a warning that I need to drive as noted (See my picture with 27 Miles, because I didn't go anywhere far when I first got it).

This is not a Jeep thing, it is a Diesel DPF thing and if you have had it happen 6 times, I would say there is no real issues. So when it comes up with that warning, you keep driving until it says the Regen is complete correct? The most important thing, is that it is completing the Regeneration when it asks you to do so, in order to keep the DPF in working order.

Please feel free to ask any questions you like about this process and what is going on but the system is designed to Regenerate itself constantly as well as warn you when it does not meet optimal specs to perform a Regeneration. It is a complex system, and I would be happy to help explain how it works if that helps.

**Edit... I want to make sure I note, that DEF does lots of wonderful things to emissions but it is not the first thing I look at in a DPF issue instance and that I am mainly disappointed that the dealership did not spend some more time explaining the workings of the system as it would likely have taken a lot of stress off of you. **ALSO** I am not physically connected to your truck so I cannot guarantee there is not an issue but from what you have said this seems normal based on my experiences.

Willx 03-18-2014 05:27 PM

Well I wouldn't say I recommend driving it "like you stole it" but let me ask a few more questions to better understand. When it came in in limp mode was this after the DEF filter near full warning was on for a while?

Also, what reasoning did they give to the limp mode being set?

There are lots of people who use diesel for short trips but I need to understand a little more about why you bought the diesel and what your primary purpose is... What State are you located in? (just so I am not making climate comments that don't apply to you)

If there are any questions you do not wish to share with the group please feel free to PM me.

dieselgirl 03-18-2014 06:14 PM

Re: 2014 Grand Cherokee Diesel
 
The town I live in has a max speed of 40 mph through town. I completely stopped remote starting it, even on our 20 degree mornings. I have very low idle time on here but I guess I will start driving it like I stole it! I drive a block to and from work every day so I'm sure that's the reasoning. The dealership here doesn't want to deal with the diesel because they don't even stock them on the lot. When I took it in the first time at 1000 miles and it was in limp mode they looked shocked. Had it for 3 days trying to figure out what to do. Are there any remedies for this problem or just driving it while it's hot?

dieselgirl 03-18-2014 06:23 PM

Re: 2014 Grand Cherokee Diesel
 
I live in carlsbad new mexico. My light had come on the first time so I went straight to the dealership while I was luckily on my lunch break. They couldn't see me immediately so told me to drive back to work and bring it in later that evening. I had out maybe 5 miles on it and it went into limp mode. So while the dealership had it they had to re flash the ECM. I park in a dirt lot at work and it gets really dusty But I doubt that has anything To do with it. My light came on Thursday last week. I went through regen and then it sat all weekend. Drove to work yesterday and home then drove to work this morning and at lunch is when my light came on again.

Willx 03-18-2014 06:45 PM

Are you going to tow anything? Sorry just trying to understand why you decided on diesel... Could be just you like the way it drives and that is great but I don't hear of too many people going diesel who drive only a few blocks a day.

dieselgirl 03-18-2014 06:55 PM

Re: 2014 Grand Cherokee Diesel
 
The power and we're getting a boat this summer. The fuel economy is amazing and when I make my 700 mile road trips a few times a year back to Houston it will definitely help me.

Benn0 03-18-2014 09:44 PM

Re: 2014 Grand Cherokee Diesel
 
Us aussies are getting this problem a lot.
http://www.jeepgarage.org/f190/is-dp...now-71792.html

Not sure if your problem is the same, but we've had quite a few diesels go into limp mode with the dpf full. The car should do a regen when it detects the filter is filling up. To do a regen you need to be at 'highway speeds' (I'm guessing this is anything over 50mph?) for an extended period without stopping. Should be 15-20 mins. This allows the engine to heat up and pump some diesel down into the filter and get it to burn the soot off that is caught in the filter. When it does this you should see a message on your display about regen in progress and a percentage indicator of how full it is.

What we are seeing here in Oz is that even though the engine computer detects that the dpf is filling up, and the car is at highway speed it refuses to do a burn off. The solution has been to get the dealership to perform a forced burn using their diag machine. It heats the exhaust up to burn off the soot and it is all clear. But many have seen the issue reoccur after, despite extended highway driving.

Some have now been advised that their dpf was faulty from the factory and needs to be replaced. So far it seems all the problem diesels are in a certain range of build dates, so perhaps this is correct, but it could also be misinformation. We are yet to see if this resolves the issue.

Anyway, yours is the first I've read of the issue occurring in the US, I thought it was limited to the export vehicles. So perhaps it isn't the same problem, but I'd ask the dealer to perform a manual burn off to clear it, and if it still happens despite driving at highway speeds regularly, see if they will replace it under warranty.

Good luck!

dieselgirl 03-18-2014 10:26 PM

Re: 2014 Grand Cherokee Diesel
 
I assume you're running the same Motori engine we are in the states. Do you guys have DPF delete kits over there? I had it go into limp mode while it was attempting a regeneration cycle. The dealer had it for 3 days to force it and re flash the ECM. I wish I could figure something out because most every time my light comes on is when I'm pulling into work and have no choice but to shut it down instead of keeping on driving.

Benn0 03-19-2014 12:45 AM

Re: 2014 Grand Cherokee Diesel
 
We don't have the DEF on the exports. It is a US regulatory thing.

It shouldn't matter that you are pulling up when the light comes on, next time you are at highway speed it should start up the regen again. So if it does that in the morning ont he way to work, when you finish work go for a 20 min drive on the open road, it should go into regen (if it doesn't then there is something wrong).

Seems there has been a TSB for dpf issues just released. Might be worth getting flashed again:
http://www.wk2jeeps.com/tsb/tsb_wk2_1801814.pdf


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