It now seems like I can't go 200 miles without my truck going into a regen. '15 F350 6.7. I'm wondering if I should have it checked out. That seems like that it should go a little longer. FWIW, I didn't realize the cost in fuel mileage that a regen does.

 

 

The max distance between regen is 500 miles since the last completed regen. Around town, you might regen around 200 miles or up to 300 miles.

 

 

My regen's on average using one gallon of fuel.

 

I would regen around 200-225 if I did a lot of idling. If you don't let the regen run to completion it will definitely come a lot sooner.

My regens would require an additional 0.7 gallons on top of what would normally be burnt driving.

 

If the regen doesn't complete, it will pick up where it left off during the next run.

The new trucks will show regen details.

 

If the regen doesn't complete, it won't start again until the filter is full.

 

Now that I work from home I haven't been putting the mileage on my truck as I did when I 1st bought it and typically just use it for "around town" driving. When I see the regen message I usually take a ride, try to get it on the interstate until it finishes. That being said, I also use PM-22a at each fill-up which seems to help.

 

OK, this morning the display said it was 95% full so I decided to make a trip to KC for some materials and that puts me for quite a few miles on Interstate 435. The truck went from the 70% to 100% in 160 miles. It went to 100% full, the check engine light came on and then it started its cleaning cycle. At 70 mph it started dropping and when it got to 85% I get a def system error and a warning that it would go into reduced power (50mph) in 50 miles. I turned around and headed back home before it failed on me. I checked the codes with Forscan and I got a P207F so off to the dealer it went. I'm now driving a '18 F150 until the repair mine and already I want mine back.

So far for a 2015 this thing has had a low pressure fuel pump, a high pressure fuel pump, a new gasket between oil filter adapter and block, and now whatever it will take to clear this code up. This is all in less than 33k miles. I love driving the truck but it may have to go down the road if I can't keep it out of the shop. It's out of warranty on time but I am hoping that it is still under the emissions warranty.

I researched the P207F and one possibility is bad DEF. I doubt that is the case as I filled it right after the HPFP was replace back in February. It's had a little over 2500 miles on it since then and the display shows DEF level OK.

Edit to add: This time the clean cycle got down to 15% before it shut off. Even with the DEF error issues.

I guess we will wait to see what happens.

 

Still at the dealer?? 😄

 

Old thread resurrection but no, not at dealer. FWIW I did continue to have issues up until Feb of 20 when the dealer replaced a bad nox sensor. After that I drove almost 4k miles and the def tank didn't drop. The display still showed good. I checked with dealer and they had no answer other than the def system showed no codes and was working. Another 2k miles and it finally sent a message 500 miles to empty. I ran it down to 40 miles until reduced power and put two gallons in it. That still showed the level under half in the tank. 900 miles later I got the 500 mile message again. So now, I put just enough in to take it over the 1/2 mark in the def tank and monitor it to see what and when it does go down. The truck is about to turn over 60k on the odometer and I finally haven't had any issues since Feb of '20.

 

The amount of DEF fluid that you use will depend on whether or not you tow. The harder the 6.7 works, the more DEF it uses. The '11-'16 F-250's have a 5 gallon tank. I only tow a couple of times a year, and one tank full usually lasts me for around 5k miles. Do yourself a favor...when the tank says it's low, fill it all the way to the top. Go get the spout from the Ford dealership to avoid spills. It's less than $20 and is super helpful. Just remember to rinse it with fresh water when done so the DEF fluid does not crystalize inside of it. There has been a lot of discussion about what causes the DEF tank heater to go out. Many have speculated that when the DEF tank gets low, the heater element is exposed and eventually causes it to burn itself out. I make it a habit to regularly check the level in my DEF tank. Anytime it reads less than half, I completely top it off. Completely topping it off also serves another purpose. There is not a complete level sensing unit in our tanks. Simply a Full, Half, and Near Empty sensor. You want to make sure that Full sensor is hit every time you fill the tank. Others have reported the truck not recognizing 2 1/2 gallons being added, because the sensor wasn't tripped. They ended up getting the Reduced Power message because of it.

 

There was a discussion on this, about keeping the DEF tank full to keep the heater in fluid to help the heater last longer, in the 6.7 section. I used to do that and my DEF heater still went out last year at 50 some thousand miles. I still check every 3k to 4k miles and put in around 2.5 gallons.

 

Lol, well...I did say that a lot of people had discussed and speculated on it! Hate that happened to you Overkill. Seems to be more like it's just a crappy part.