Another DEF issue - Diesel Truck Forum -
Thread Details Posted by Joe/GA, this thread has received 3 replies and been viewed 3166 times.

LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old 03-01-2015, 09:18 PM Thread Starter
Junior Member
Join Date: Feb 2011
Posts: 33
Points: 22,510
Thanks: 0
Thanked 0 Times in 0 Posts
Another DEF issue

I've seen where folks let their DEF get low and got an 800 or 500 mile range warning. I had better than a half tank of DEF when I got a 500 mile range warning. Just to be sure, I got a 2 1/2 gallon container and started pouring it in. After about 2/3 of the DEF went in, the tank was full. Cranked the truck and I still have the warning. Now I'm down to 463 miles. I have about 265 miles that I need to drive tomorrow while pulling a 16,500 Lb 5th wheel camper. Will the count down be the same as not towing? Any way that I can fool the computer, like puling battery cables for 5 minutes?

2015 F-350 Lariat CC, LWB, DRW
Joe/GA is offline  
Sponsored Links
post #2 of 4 (permalink) Old 03-06-2015, 02:00 PM
Senior Member
Dodgefarmer's Avatar
Join Date: Dec 2008
Location: Northern California
Posts: 1,224
Points: 102,846
Thanks: 162
Thanked 222 Times in 156 Posts
Don't know any thing about the Fords but def usage is basically in proportion to diesel usage. so with towing getting less mpg you will use more def per mile. In my Dodge I get ~3,000 to 3,200 miles per 2.5 gal of def. That figures out to 1.25% to 1.5% of def to diesel usage.
Just a thought, could it be a bad def level sensor in the tank????

Remember not to talk bad about farmers with your mouth full!
2013 6.7 CTD 2500, 800 ft-lbs torque, 4x4 crewcab Larmine Longhorn edition, 6 sp. auto, 2 tone white/gold
--07 6.7CTD 2500 4x4, Quad Cab, Big Horn Pkg. 3.73, airbags, 6sp auto, with Mag-Hytec deep pan.- sold but not forgotten.
--08 36' Jazz 5th wheel,triple slide, 12,000lbs
--28' 22,400# PJ goosneck beaver tail trailer
--95 & 96 5.9CTD 4x4 5sp. ext. cab. 33x12.50x16 front, 33x15.50x16 rear tires. R-1 tread, wheelbase shortened 30". Used as tugs on farm
--81 IH 1800, DT466 210hp, 10 speed,
--95 FL70, 8.3 cummins 275hp, 10speed
--79 GMC 7000, DD 6V53 210 hp, 6sp ally
-- A whole bunch farm equipment, all colors
singles club # 198
WALNUT MEMBER #11(workers aganist lazy non-producers united together)
Dodgefarmer is offline  
post #3 of 4 (permalink) Old 03-13-2015, 12:31 PM Thread Starter
Junior Member
Join Date: Feb 2011
Posts: 33
Points: 22,510
Thanks: 0
Thanked 0 Times in 0 Posts
I'm a little late, but here's a follow up. I cranked the truck the next morning and the message was still there. An hour or so later, when I was ready to back up to the 5th wheel and hook up, I cranked it up and the message was, again, still there. Some time in the next 10 minutes, while I finished getting ready to hit the road, the message went away. I had no issues during my roughly 265 mile trip and the truck ran beautifully, as usual. On another site, some say you should wait until the tank is almost empty to refill it. And, they said this is in the manual. I have to confess that I have not read all of the manual and still have not had the time to do so.

2015 F-350 Lariat CC, LWB, DRW
Joe/GA is offline  
post #4 of 4 (permalink) Old 03-17-2015, 05:18 PM
Junior Member
Join Date: Mar 2015
Location: Boston
Posts: 13
Points: 12,723
Thanks: 0
Thanked 2 Times in 2 Posts
I love my 2015 6.7 so far. It's just now telling me that it needs DEF (500 miles to go) at the 4700 mile mark and I do pull a trailer (about 5k total) with it some.
I never saw any other warning about DEF before now.
sailboatjim is offline  

Quick Reply

Register Now

In order to be able to post messages on the Diesel Truck Forum - forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Similar Threads
Thread Thread Starter Forum Replies Last Post
DEF Usage Dodgefarmer 2013+ 6.7L Cummins HO 1 09-20-2014 05:29 PM
DEF tank STORM TROOPER GM Performance Forum 3 11-03-2013 05:37 PM
DEF tank STORM TROOPER Duramax 2011+ (LML) 0 12-31-2012 12:12 AM
DEF Contamination Acedog Introductions 1 08-22-2012 05:45 PM
DEF??? What gives? One Fast Harley 2011+ 6.7L Power Stroke Diesel 21 06-14-2011 05:56 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome