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  #601  
Old 01-19-2015, 11:53 PM
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Re: Is DPF issue for 2014 CRD fixed now?

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Originally Posted by Steve1307 View Post
Thanks, I'm always interested in stuff like this

[maybe too much so... I wouldn't recommend anyone inviting me to their house for dinner ]











this sounds like the new Jeep ad on TV where the kid in the back moans "are we there yet?..... are we there yet?" and the Dad is staring straight ahead and keeps on drivin,. "no son, not yet."



He's in the middle of a Regen cycle and can't stop !!



"Are we there yet?"

"no son, a bit further"



Eventually he runs out of road where it ends at the ocean and the regen must have finished as he says, " ahh.. glad we bought a Jeep" <sarcasm?>

Pretty stupid add
And have have some duds


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  #602  
Old 01-20-2015, 06:54 PM
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Quote:
Originally Posted by Bigskiddy View Post
Just when I thought I was in the clear it struck.

Lucky I was only 2km from home. Usual scenario message flashed up to drive at highway speed, then into limp mode, limiting to 60kph.

June 2013 build. 32,668km. Always used Caltex Vortex Diesel. 80% of driving is highway, done about 10000km of towing 2tonne caravan.

Will be towed tomorrow.
Here's the updates dealer has applied. Fingers crossed it works.

Just noticed the P67 recall. No parts available. I'll put some extra pillows in for the kids.
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  #603  
Old 01-20-2015, 10:11 PM
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Re: Is DPF issue for 2014 CRD fixed now?

Cool, so 14-104 is the update for DPF and knocking sound (detonation) and cruise control inoperative. I've been trying to avoid the sun visor recall, they have to remove half your interior for that.

I'm confused about them applying 08-053-14 for the error code U1424-00. That error code isn't listed in the TSB. I found that error code reported in this thread:
Diesel transmission jumping
But it is a bit old, so.....
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  #604  
Old 01-20-2015, 11:15 PM
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Re: Is DPF issue for 2014 CRD fixed now?

Quote:
Originally Posted by Benn0 View Post
Cool, so 14-104 is the update for DPF and knocking sound (detonation) and cruise control inoperative. I've been trying to avoid the sun visor recall, they have to remove half your interior for that.

I'm confused about them applying 08-053-14 for the error code U1424-00. That error code isn't listed in the TSB. I found that error code reported in this thread:
Diesel transmission jumping
But it is a bit old, so.....


U1424-00 "implausible engine torque received", - have an upgrade, did we?


the TSB they applied only mentions as "similar" type situation with a different erroneous fault code:

U0422 - "Invalid Data Received From Body Control Module" (I get that one alerting in my brain when i'm really drunk)


P67 recall is the controller module for airbag and seat belt potentially might fail. If it is actually faulty then the MIL would be lit it says. If it's lit and they still haven't got the parts get the extra pillows.

vehicles 30 Oct'12 up to -30 April'14.
Mine doesn't have that so it must be a May'14


We're all interested to see how that 14-104 (18-019-14a) DPF fault and Engine knock/rattle update cure goes.
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  #605  
Old 01-21-2015, 01:04 AM
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Re: Is DPF issue for 2014 CRD fixed now?

Hi Benn0,

Interesting that, the first time mine went into limp mode with the DPF problem, the invoice noted that "Checked dtc and found pcm P2463:00 Diesel particulate filter soot accumulation and tcm - U1424:Implausable engine torque. Checked for pcm reflash as per TSB TT00414. Reflashed pcm... Submitted technical case. Reflashed tcm software, cleared all dtc's"

You are the first one to mention the U1424 - implausible engine torque bit and I am now wondering if that is part of it.
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  #606  
Old 01-21-2015, 01:49 AM
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Quote:
Originally Posted by Benn0 View Post
... I've been trying to avoid the sun visor recall, they have to remove half your interior for that.
Yeah I was disappointed that they did that. I was keeping that in the bag, if the DPF keeps playing up there was always the hope my car might catch on fire and burn.

Being an American SUV I'm sure there are other potential sources of fire
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  #607  
Old 01-21-2015, 01:52 AM
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Re: Is DPF issue for 2014 CRD fixed now?

Just park a new Cherokee next to it.
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  #608  
Old 01-21-2015, 05:54 AM
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Re: Is DPF issue for 2014 CRD fixed now?

If you're lucky the car will burn hot enough to clear the DPF, win win.
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  #609  
Old 01-21-2015, 04:22 PM
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Re: Is DPF issue for 2014 CRD fixed now?

Quote:
Originally Posted by dixonf View Post
Hi Benn0,

Interesting that, the first time mine went into limp mode with the DPF problem, the invoice noted that "Checked dtc and found pcm P2463:00 Diesel particulate filter soot accumulation and tcm - U1424:Implausable engine torque. Checked for pcm reflash as per TSB TT00414. Reflashed pcm... Submitted technical case. Reflashed tcm software, cleared all dtc's"

You are the first one to mention the U1424 - implausible engine torque bit and I am now wondering if that is part of it.
U1424 was listed on bigskiddy's invoice. I wonder if it is a side effect of going into limp....
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  #610  
Old 01-21-2015, 05:47 PM
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Re: Is DPF issue for 2014 CRD fixed now?

Thinking about the DPF regeneration issue and the fact that a couple of us have also the error code U1424:00 Implausible engine torque, I find that a lot of things are implausible about the error codes etc received cause as well at that, the second time mine went into limp mode after only 460 k's (180 on Highway) the soot mass was recorded at 118% and the third time into limp mode after 2000 k and a lot of highway travel in that, it was 110% full.
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Old 01-21-2015, 07:16 PM
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Re: Is DPF issue for 2014 CRD fixed now?

Well the software fix is supposedly to correct a condition where the computer is misreading the data from the sensors. So those numbers could be misreads.

Another way to look at it is that the pressure sensor will be calibrated with certain air pressure differences equaling an expected amount of soot. The difference in air pressure could just simply be greater than what the 100% calibrated value is. ie if 10psi is thought to be 100%, then 11psi is 110%.
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  #612  
Old 01-21-2015, 10:37 PM
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Re: Is DPF issue for 2014 CRD fixed now?

Quote:
Originally Posted by Benn0 View Post
Well the software fix is supposedly to correct a condition where the computer is misreading the data from the sensors. So those numbers could be misreads.

Another way to look at it is that the pressure sensor will be calibrated with certain air pressure differences equaling an expected amount of soot. The difference in air pressure could just simply be greater than what the 100% calibrated value is. ie if 10psi is thought to be 100%, then 11psi is 110%.
Yes, since all the sensors (temp, pressure diff) feed into the PCM and all of the controlled components (injectors, EGR etc) are run by the software in the PCM. You live and die by the programming and the accuracy of the sensor and actuator calibration.

Let's say the calibration of the differential pressure in across the DPF is out. The sensor might only trigger the active regen only when the filter is far too blocked. (the guy the "kinked" capillary tube had the same effect from this mechanical problem)

If the EGT sensor is out of calibration then this will effect the EGR commands. If it reading a higher temperature than actual, then the PCM will operate the EGR to cool the combustion = more soot.

A similar story with the EGR valve. I assume it has an actuator(?) and a position feedback. If there is a mismatch here then it could effect the operation of the EGR. Again, if the EGR is set for too much recirc = cool combustion = more soot.

Even if the sensors themselves are calibrated correctly (and independently) there might even be errors in the scaling of the readings to the PID value seen by the PCM. Wrong data in = wrong sequence out. (Garbage IN = Garbage OUT my boss always says).
I've had a look at some of the standard PID's, pretty complicated and there are plenty more proprietary ones Chrysler wont show us. Very complicated.

Another factor is errors in the programming, not so much "bugs" but inappropriate setpoints for the operating conditions, and the possibility of unsuitable events occurring the sequence.

example: An active regen is triggered "drive at highway speed" and then only seconds later the vehicle goes into limp mode.
That's not very robust programming.
Putting in a "10minute delay" before the limp mode as was mentioned before sounds like putting a band-aid on a burst artery.


If the sensors aren't failing, and the filters aren't failing with some "sticky coating", and the oil level doesn't make a difference then it must all be in the programming.
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