DPF fitting not reconnected after dealer warranty work. What is it/is it a concern?

[EZRider]

I had warranty work performed that required the DPF to be removed. A fitting was stripped in the process and the dealer installed a new DPF. I have driven about 2000 miles since then. Yesterday I noticed that a fitting at the rear of the DPF was not connected (see photos).

I have not had any messages or warnings and haven’t noticed anything unusual. My questions are : (1)What is this and its function? (2) Could this cause problems or done damage in the future I am not aware of? I connected the fitting and everything seems good. The photos are looking toward the front of the vehicle.

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[Freems]

I had warranty work performed that required the DPF to be removed. A fitting was stripped in the process and the dealer installed a new DPF. I have driven about 2000 miles since then. Yesterday I noticed that a fitting at the rear of the DPF was not connected (see photos).

I have not had any messages or warnings and haven’t noticed anything unusual. My questions are : (1)What is this and its function? (2) Could this cause problems or done damage in the future I am not aware of? I connected the fitting and everything seems good. The photos are looking toward the front of the vehicle.

There are a lot of connections lines between major components in that exhaust system (6 or 7 at least) it’s probably one of those. Straight back to the dealer, make sure to ask them if you can expect this impeccable level of service work to continue on any future visits. Unbelievable.

 

[EZRider]

I sent the same pictures to the dealership and I’m waiting to hear back from them. Unfortunately this type of thing seems to happen more often than it used to.

 

[CrazyCooter]

Seems to be the norm in all industries these days.......

Dealer hacked my DPF replacement as well....... The rubber bushing on the mount, the clamp holding the tube weren't reinstalled, and the tube was actually hitting the floor. I have a list of $65 in parts I need to fix it properly. I should just be thankful they replaced a $2K part
for me?

 

[EZRider]

I had warranty work performed that required the DPF to be removed. A fitting was stripped in the process and the dealer installed a new DPF. I have driven about 2000 miles since then. Yesterday I noticed that a fitting at the rear of the DPF was not connected (see photos).

I have not had any messages or warnings and haven’t noticed anything unusual. My questions are : (1)What is this and its function? (2) Could this cause problems or done damage in the future I am not aware of? I connected the fitting and everything seems good. The photos are looking toward the front of the vehicle.

I’ve found that it is the tube for the DPF pressure differential sensor. Here is what it does:
A DPF pressure differential sensor measures the pressure difference between the exhaust gas before and after a diesel particulate filter (DPF), allowing the engine control unit (ECU) to monitor the buildup of soot within the DPF and trigger a regeneration process to clean it when necessary, ensuring proper emission control by preventing excessive backpressure in the exhaust system.

 

[Lost1wing]

I was afraid of that. The computer didn't see much of a dp and therefore no need for a regen. I hope it works out. Maybe the dealership could do a forced regen and make sure you are not plugged up.

 

[CrazyCooter]

That is the tube toward the rear of the filter yes? If so, it would be the lower pressure side, so if anything, it would regen more often due to the reported pressure differential being greater than actual?

 

[EZRider]

I was afraid of that. The computer didn't see much of a dp and therefore no need for a regen. I hope it works out. Maybe the dealership could do a forced regen and make sure you are not plugged up.

That is the tube toward the rear of the filter yes? If so, it would be the lower pressure side, so if anything, it would regen more often due to the reported pressure differential being greater than actual?

It goes to the dealer Wednesday morning so hopefully they can determine if anything needs to be done. I know that’s asking for a lot but what else can you do? Can they read the pressures with a scanner while it’s running?

 

[Lost1wing]

It goes to the dealer Wednesday morning so hopefully they can determine if anything needs to be done. I know that’s asking for a lot but what else can you do? Can they read the pressures with a scanner while it’s running?

Yes. That is kind of a basic parameter on a diesel. A cheap innova scanner will.

 

[Chris A]

Crazycooter is correct. Extra regens would waste fuel and also add wear to the DPF. I have taken it upon myself to learn more about the DPF, SCR and DEF systems since it appears many shops don’t seem to understand how to troubleshoot and repair. These systems parts are expensive and they tend to throw parts at them. I highly recommend checking out a YouTube channel, O’Rileys autos. And no it has nothing to do with the auto parts store. All he repairs are these systems and typically ones that have had hundreds or thousands thrown at them. Our systems aren’t really much different than the ones in the UK. They have a few additional things which we will likely see in the US before long. Including a GPF and yes the G is for gasoline! So all the diesel haters will get to deal with the same before long or buy a BEV.

 

[EZRider]

Crazycooter is correct. Extra regens would waste fuel and also add wear to the DPF. I have taken it upon myself to learn more about the DPF, SCR and DEF systems since it appears many shops don’t seem to understand how to troubleshoot and repair. These systems parts are expensive and they tend to throw parts at them. I highly recommend checking out a YouTube channel, O’Rileys autos. And no it has nothing to do with the auto parts store. All he repairs are these systems and typically ones that have had hundreds or thousands thrown at them. Our systems aren’t really much different than the ones in the UK. They have a few additional things which we will likely see in the US before long. Including a GPF and yes the G is for gasoline! So all the diesel haters will get to deal with the same before long or buy a BEV.

I’ve only driven 2000 miles since the pressure differential tube was not reconnected by the dealer. Am I correct in thinking that in 2000 miles there would only be minor, if any, additional wear on the DPF? Is there any way to make that determination? Thanks for the info.

 

[CrazyCooter]

I wouldn't sweat it honestly. If the pre filter vs post filter pressures were whacked out enough, there would likely be a code for filter inefficiency.

 

[Chris A]

I’ve only driven 2000 miles since the pressure differential tube was not reconnected by the dealer. Am I correct in thinking that in 2000 miles there would only be minor, if any, additional wear on the DPF? Is there any way to make that determination? Thanks for the info.

I am not a diesel mechanic nor any kind of expert but I doubt you have any concern. It is my understanding a DPF should last about 150k, I would doubt much difference in regens if any in that distance. Excessive short distances and insufficient long drives seem to be the worst concern. I use this product “ AUTOPROFI DPF Cleaner (for Diesel” I get on Amazon. I would not do a forced regen. James O’Riley YouTuber does a great job explaining how the system works which can help you get the most from it. Probably the best thing is to learn when your vehicle is doing an active regen and letting it complete it. My Promaster van ecodiesel is much easier to tell than the Jeep engine with out a scanner or gauge. Long drive cycles it will keep cleaning with a passive regen. Good quality fuel also is supposed to produce less soot/ash.

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