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Discussion Starter #1
I will try to make this brief as I can but. In my previous life I was a certified technician that specialized in electronics and drive ability issues. This was before OBDII and I was not just a trained monkey, I was a diagnoser. Excuse me if I have some of the new terminology incorrect.

I drive a 2015 ED with 60,000+ miles on it and love it. I drive 20 miles to work so everything gets to normal operating temp. A few weeks ago I let it set and idle as I talked with my neighbor for over an hour. After I started driving the CEL came on and my neighbor, who is still a technician, scanned it to find the P24AE. Our research shoes this to be the PMS (Particulate Matter Sensor). Cleared the codes and drove for a few days before it came on again, right after I went through an automatic car wash. I read about the moisture in the connector on the frame rail but didn't have time to pull it apart to check for moisture. Continued to drive and every few days the light would come on and i would clear the code.

This past weekend I took a 10 hour trip and had a friend with Torque and a blue tooth so we monitored the PMS DPF. Pulling a 6,000 lb trailer at highway speeds the DPF % varied between 40 - 64%. Then the CEL came on and it went to 100% and stayed there. When we stopped for a break we cleared the codes and when we hit the road again the DPF was at 20%.

To me that sounds like a sensor but me being me I want to make sure there is not something else causing the code and the sensor is acting normal.

Today I pulled the all of the frame rail connectors apart and cleaned them. none of them looked like they had moisture in them but the one on the inside of the frame rail had been pulled off it's mounting clip and was just hanging. I will clear the code and drive tomorrow.

My question to any true mechanic on this forum is: Is there any diagnosis other than replacing the sensor?
 

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Discussion Starter #2
Follow up Info:
I may not need to diagnose the PMS. I put the truck on a lift and took a look at the large connector on the inside of the frame rail. It had been knocked off the mounting clip and was hanging in mid air. I blew some water out of it and remounted. Then proceeded to clean the 3 on the outside of the frame rail. Now I have driving a couple of days with no codes.
 

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Hey just curious how you got to the sensors connections to clean them? The way it's mounted on top of that rail I can't even see it let alone pull it.
 

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Discussion Starter #5
I cleaned the one on the drivers side frame rail, not the one above the drive shaft. I believe you would have to unbolt the module from the bracket.
 

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Discussion Starter #6
This is really a bite. I cleared the code, drove the truck a week back and forth to work, 20+ miles one way, and around town with no light. Yesterday I drove 100+ interstate miles and when I started driving home after the truck sat for a couple of hours I have a light. Cleared it and it came back on within a few miles. Drove in dry weather. The question is; is it a sensor or is it something else triggering the sensor? 60,000+ miles stock with no egr cleaning yet. Any one have any ideas? Those of you who have this code, did the sensor fix it?
 

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When you had the connector apart, did you check for loose pins? Also did you apply dielectric grease to the pins in the plug?
 

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Discussion Starter #10
When you had the connector apart, did you check for loose pins? Also did you apply dielectric grease to the pins in the plug?
All pins looked and felt tight. Did not apply any dielectric grease, yet. Seams like mixed reviews on doing this. This is one of the best reviews I have seen on dielectric & conductive grease. https://www.w8ji.com/dielectric_grease_vs_conductive_grease.htm Think I will try the dielectric grease and do a tune after the FCA tune.
 

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I'm getting an intermittent P24AE code as well. If I stick to my 25mi each way commute to work, everything is fine. We've recently got a commuter car and if I spend a couple of days driving around town, CEL will come on with p24AE code. I'm not sure that the frame rail connector is the culprit. I'm thinking the sensor is going bad. I never delete the code, a normal long commute or 2 will always clear the code on the next start up. I've also removed the sensor from the exhaust bung, it was clean with only SLIGHT discoloration. I guess I was secretly hoping that it would be gunked up and I could get after it with a wire brush, etc. Anyway, the sensor connector is way up on top, out of sight. I'm leaning towards buying a sensor and replacing in the near future. Can't see paying the dealer to do it. Seems they charge $270 for sensor and $250 for labor.... Ugh

Hoping that maybe some answers pop up here.
 

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Discussion Starter #12
If it is not all gunked up I would not think there was something else causing the problem. I am going to try to hold out until the update. If I am not mistaken the sensor will be covered under warranty then. If not I will do the same as you and buy one and replace it. I think there are two bolts to remove to get the module out of the mount. One you get from the top the other the bottom.
 

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Having the same issue. Had this problem back in October and it stayed off for a while. About a month or two ago, it started back. Sometimes I would drive for 10 hours at a time and nothing, but make one stop, crank the engine up and bam, CEL on. Check it, same deal, clear it, and it may pop back on in only 5 miles or stay off for 800! Plan on ordering the GDE once Uncle Sam gives me back some of my money.

Changing oil, oil filter, and fuel filter today, so will see if that changes anything.
 

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Discussion Starter #14
Darn light, I am beginning to think it is something other than the sensor causing the problem. I can run for a week without it coming on. Then idle at the boat ramp while launching & loading and as I drive off BAM it's on. Still gona wait on the reprogram and money but consider doing the GDE tune after that.
 

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P24AE Code

Darn light, I am beginning to think it is something other than the sensor causing the problem. I can run for a week without it coming on. Then idle at the boat ramp while launching & loading and as I drive off BAM it's on. Still gona wait on the reprogram and money but consider doing the GDE tune after that.
Afternoon Kevin, I'm experiencing the same problem myself. I was wondering if you have tried this for the MAP Sensor/EGR Tube:

.

Read on another forum that is a common problem and likely the issue. Gave mine a clean today and going to see if it make any difference. My sensor was pretty blocked up. Just throwing another option out there. Here is the other forum I was montioring: https://www.ecodieselram.com/forum/threads/p24ae.2042/#post-19730
Here is some pics of mine today when I pulled it apart.

20190530_161126.jpg 20190530_160315.jpg
 

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All pins looked and felt tight. Did not apply any dielectric grease, yet. Seams like mixed reviews on doing this. This is one of the best reviews I have seen on dielectric & conductive grease. https://www.w8ji.com/dielectric_grease_vs_conductive_grease.htm Think I will try the dielectric grease and do a tune after the FCA tune.
Thanks for the link!
Last grease of this type that, I purchased, was Grote brand if I remember correctly. Label as electrical connection sealing grease. Works great, little messy.

Sent from my SM-P600 using Tapatalk
 

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Well took mine in for the FCA Recall (Class Action) and 10 miles before the dealership I got CEL. Told dealership it came on right before pulling in and they said they would look into it, but most likely it was nothing (LOL). Well, they gave it back to me 4 hours later and said the code was old so they cleared it and to come back if it was an issue again. I live 2 hours from the dealer, don't think I'm just coming back if there is an issue. Well to my luck, I made it 5 miles before CEL came back on for same code P24AE. They ended up replacing the diesel particulate sensor after that. I would love to tell you that this fixed the problem, but I decided to get rid of this piece of shit. Oil cooler failure at 12K miles and then random P24AE issues, emissions issues; I'm just over this engine. I traded it in and upgraded.

I hope you all have better luck and continue to fight the good fight fixing these issues! Off to the 2500 forums to deal with new issues lol.
 
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