Join Date: Aug 2001
Location: Tallassee, AL
Feedback Score: 0 reviews
It is not a float in the DEF tank but sensors similar to the level sensors in the holding tanks of an RV. You have 3 sensors, a full, half full and then one that gives the 500 miles to reduced power. BTW, Ford calls the diesel exhaust fluid, reductant.
From the Ford Workshop DVD
The reductant heater and sender assembly level sensor incorporates four stainless steel electrodes. Three electrodes arranged vertically provide a high, middle, and low level signal and the fourth electrode runs the length of the level sensor and acts as a ground. The reductant is a good conductor of electricity. When the reductant tank is full, the reductant closes a circuit between all three level electrodes and the ground electrode, indicating the tank is full. As the reductant is consumed, the level drops and uncovers each electrode in sequence. The PCM calculates the reductant level based on these signals.
2015 F350 Ultra Lariat 6.7L CCLB DRW 3.73 Limited Slip, Green Gem Metallic w/ Caribou accent, Camper Package, Titan 65gal tank, Rapid Heat, Block Heater, Upfitter Switches, Dual Alternators, Camper Package, Cable Lock, Husky Floor Liners, Spray in Bedliner, 5th Wheel Prep, 25K 5th Wheel Hitch, Ford Goose Neck Hitch.
Traded 2011 F350 XLT CCLB SRW 6.2L gasser 6,000 miles for 2015
Sold 1996 F350 XLT CCLB DRW 7.3L 208,000 miles
Last edited by larrgh; 09-18-2016 at 10:06 AM.