DEF system fault
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8th Gear
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DEF system fault
Received def system fault, limited to 50 MPH after 50 miles on a 2012 f350 lariet 6.7. Also had a check engine light which turned out to be a #2 EGT sensor, changed the sensor however, still have the DEF system fault. Any suggestions?
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Joined: Oct 2017
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How cold is it where you are? I had that happen to me when my DEF heater took a dump when the truck sat outside on a below 0 degree night. . Check engine light came on shortly thereafter but not until later in the day but there was no check engine light when I got the warning on my dash.
DEF fluid freezes at 12 degrees F. - ish
DEF fluid freezes at 12 degrees F. - ish
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8th Gear
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How cold is it where you are? I had that happen to me when my DEF heater took a dump when the truck sat outside on a below 0 degree night. . Check engine light came on shortly thereafter but not until later in the day but there was no check engine light when I got the warning on my dash.
DEF fluid freezes at 12 degrees F. - ish
DEF fluid freezes at 12 degrees F. - ish
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From: Reno NV
Do you have access to FORScan and a USB / Wifi OBDII tool? When I had a DEF related check engine light on my '12 my normal code reader didn't show the problem, but FORScan did.
In my case I had to replace the heater, sending unit, and pump assembly in the DEF tank.
In my case I had to replace the heater, sending unit, and pump assembly in the DEF tank.
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8th Gear
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I do, no codes were showing up once I changed the GT sensor, my battery was going dead so I drove it approximately 10 miles and the damn default cleared. Did not think an EGT sensor would cause this issue however, it did.
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Laughing Gas
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2012? If you're over 100k miles give serious thought to just deleting all the DEF crap.
I'm just waiting to hit that # and its all going to come off.
Yes, there are pro's - performance / mpg / no more DEF fluid or regens or underbelly crap - and con's - emission testing / resale issues (just keep the DEF crap and put it back on if you're going to resale, if you actually have to).
Or deal with codes, repair, replacement....
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Thread Starter
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8th Gear
Joined: Nov 2017
Posts: 8
Likes: 0
2012? If you're over 100k miles give serious thought to just deleting all the DEF crap.
I'm just waiting to hit that # and its all going to come off.
Yes, there are pro's - performance / mpg / no more DEF fluid or regens or underbelly crap - and con's - emission testing / resale issues (just keep the DEF crap and put it back on if you're going to resale, if you actually have to).
Or deal with codes, repair, replacement....
I'm just waiting to hit that # and its all going to come off.
Yes, there are pro's - performance / mpg / no more DEF fluid or regens or underbelly crap - and con's - emission testing / resale issues (just keep the DEF crap and put it back on if you're going to resale, if you actually have to).
Or deal with codes, repair, replacement....
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8th Gear
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LMAO, I actually live on the river which is the county line to a non-smog county... Would move if I could find something as nice on the other side but having a duck blind in the back yard is nice.
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Jan 23, 2018 01:01 AM