2014 Ford F250 Super Duty Super Cab Diesel Supplement Printing 1 - Page 23

Fuel and Refueling SELECTIVE CATALYTIC REDUCTION SYSTEM Your vehicle is equipped with a selective catalytic reduction system to help reduce emission levels of oxides of nitrogen from the exhaust of the diesel engine. The system automatically injects diesel exhaust fluid into the exhaust system to enable proper selective catalytic reduction function. Diesel Exhaust Fluid warning messages and vehicle operations WARNINGS Diesel exhaust fluid must be refilled when low or replaced when contaminated or the vehicle speed will be speed limited to 50 mph (80 km/h). In these conditions, drive with caution and refill diesel exhaust fluid immediately. If the diesel exhaust fluid becomes empty or contaminated and fluid is not replaced, your vehicle will become limited to idle speed only once stopped. In these conditions, be cautious where you stop your vehicle because you may not be able to drive long distances and will not be able to maintain highway speeds until diesel exhaust fluid is refilled or replaced. Tampering or disabling your vehicle's exhaust aftertreatment system will result in severe vehicle performance limitation including eventual speed limiting to 5 mph. Your vehicle's information display will display a series of messages regarding the amount of diesel exhaust fluid available. A systems check will display messages indicating the amount of diesel exhaust fluid available (OK or under 1⁄2 full) or will produce a warning message that displays the mileage (kilometers) remaining as the fluid in the diesel exhaust fluid tank nears empty. For more information on warning messages, see the Information Displays chapter of your Owner 's Manual. As the diesel exhaust fluid level nears empty, the diesel exhaust E163176 fluid warning symbol will be displayed and chimes will sound with the messages starting at 500 miles (805 km) remaining before diesel exhaust fluid is depleted. The warning symbol and messages will continue until you refill the diesel exhaust fluid tank. Importance of maintaining the Diesel Exhaust Fluid level In order for the selective catalytic reduction system to operate properly, the diesel exhaust fluid level must be maintained. Generally, the diesel exhaust fluid tank should be filled during the oil change service interval. See General Maintenance Information (page 58). However, certain conditions or driving styles, such as trailer towing or fast rates of acceleration, will require the refilling of the diesel exhaust fluid tank more often. The engine control unit will monitor the amount of fluid available in the diesel exhaust fluid tank. Running a system check in the message center will indicate whether the diesel exhaust fluid level is ok or if it is less than 1/2 full. A message will display in the message center when the diesel exhaust fluid level is low and needs to be refilled. When you see this message, you should refill your tank. See the Information displays chapter of your Owner 's Manual for information display functions. For instructions on refilling your diesel exhaust fluid tank, see filling the diesel exhaust fluid tank in this supplement. 20 Super Duty (TFA)