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Old 01-04-2016, 05:28 PM   #11
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Originally Posted by Todouble View Post
If it's a newer ford then it's dumping def not fuel I thought?? You need a good run on the hwy to exercise that puppy. Regens take more than a few seconds. If you see the screen pop up I would at least drive it for 15-20 mins if you haven't driven it much lately.
DEF is continuously added in proper proportion to reduce NOx emissions.

The soot particle trap is cleaned by injection of unburned fuel into exhaust system to burn off soot. When in regen, the idle is usually increases ad well.


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Old 01-04-2016, 06:21 PM   #12
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Originally Posted by CWSWine View Post
I have 2015 Ford F350 PS that hasn't been driven much for last 6 months due to back surgery. Lately I have taken on some short trips and seems like just before I get home a screen pops up on my DIC that says something to the effect "Exhaust Filter Cleaning" for about 4 seconds then goes way. When it goes away is done or should be drive around the block and let it complete the cycle? Should I take on highway and drive it? I going fill up the tank today because we are leaving for the Caribbean and won't be back to the end of the month and just going to sit while we are gone.

This is normal in the 6.7 PSD. The DPF cleaning can be either "active regeneration" by injecting diesel fuel into the DPF to increase temperature or by "passive regeneration" which is simply the sensors taking note that the DPF temperature from normal operation (usually towing) has increased to the level required for regeneration. You will get the pop-up on the display with either regen. No big deal. It's normal. The powertrain control module keeps track of all of this. A manual regen would only be required in the most unusual circumstances (too much easy driving for too long as an example).

DEF is injected into the SCR portion of the exhaust system and not associated with DPF regen.

Modern diesels are made to be driven... not abused but not driven by granny going to the store either. Towing is the best action you can do for your truck... no matter if a Ford, Cummins, or a Duramax.

Take your truck out to the interstate once and a while and give it a little "gas". You are doing it (and yourself) a favor! Today's diesels especially with items like the variable vane turbos on them can actually become clogged with soot if you don't put it to work now and then. Big money and I mean BIG money on turbo replacement.


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Old 01-04-2016, 06:29 PM   #13
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I would agree on driving it. If you don't it will regain again next time out as it did not complete it last time. It is cold here now and today the Regen came on just as I got back from dinner. Went for a highway run at 100 kph for about 20 km each way to clean. Since I got the truck in June I have added maybe $25 of DEF, have 16,000 km on the truck. I barely get the truck warmed up on a normal daily commute, the new house we are moving too is additional 10 km so I should be up to operating temperature twice a day.
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Old 01-04-2016, 11:12 PM   #14
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It is normal, will say real quick when it's starting and will flash real quick when it's done, should be driven at highway speed so it can finish its thing, but not a big deal to interrupt just know that next time temp is up to normal it will keep trying to regen

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Old 01-05-2016, 12:21 AM   #15
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+1 on the above suggestions. I can always tell when my VW is doing a regen, the auxiliary fans kick on to cool the engine compartment because the extra fuel injection into the DPF really heats things up. If you don't complete the cycle and shut the engine down before it's finished, not only are you trapping excessive heat which can damage components, but now, it will have to do it again the next time you start up. Best bet is to take it on a half hour ride out on the interstate, 15 minutes out and 15 minutes back. And yes, DEF injection (also called SCR) is a totally separate event from anything that happens in the DPF. They really need to come up with some new acronyms! 😂
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Old 01-05-2016, 05:52 AM   #16
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Grab the diesel engine supplement in your owner manual packet. Explains it in great detail and so it can be understood by the average person.
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Old 01-05-2016, 01:44 PM   #17
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One hour at highway speed if possible.
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Old 01-05-2016, 01:48 PM   #18
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It is easy to miss that short regen message. I wish it stayed on until it was over. I watch the fuel mileage monitor to tell when it's finished. In regen your mileage tanks. Sometimes I know it has started by the sound of the engine when I am driving along at a consistent speed.
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Old 01-05-2016, 02:02 PM   #19
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And that's why all three makes are very different and I don't go with a 25k oil change like I used to even though I use amsoil. About 10k that's it. And the newer diesel don't let them idle like the older ones.
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Old 01-05-2016, 02:04 PM   #20
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Its normal My F350 dose it also when driving around town. But never seen it on freeway. 1st time I asked dealership and said it is part of the computer programing when you don't drive over 55 for extended period.

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