2018-F150-Owner's Manual

Engine Emission Control

SELECTIVE CATALYTIC REDUCTANT SYSTEM

Your vehicle may not pass the I/M test if the service engine soon indicator is on or not working properly (bulb is burned out), or if the OBD-II system has determined that some of the emission control systems have not been properly checked. In this case, the vehicle is not ready for I/M testing. If the vehicle’s engine or transmission has just been serviced, or the battery has recently run down or been replaced, the OBD-II systemmay indicate that the vehicle is not ready for I/M testing. To determine if the vehicle is ready for I/M testing, turn the ignition key to the on position for 15 seconds without cranking the engine. If the service engine soon indicator blinks eight times, it means that the vehicle is not ready for I/M testing; if the service engine soon indicator stays on solid, it means that your vehicle is ready for I/M testing. The OBD-II system checks the emission control system during normal driving. A complete check may take several days. If the vehicle is not ready for I/M testing, you can performthe following driving cycle consisting of mixed city and highway driving: 1. 15 minutes of steady driving on an expressway or highway followed by 20 minutes of stop-and-go drivingwith at least four 30-second idle periods. 2. Allow your vehicle to sit for at least eight hours with the ignition off. Then, start the vehicle and complete the above driving cycle. The vehicle must warm up to its normal operating temperature. Once started, do not turn off the vehicle until the above driving cycle is complete. If the vehicle is still not ready for I/M testing, you need to repeat the above driving cycle.

Your vehiclemay have a selective catalytic reduction system. The systemhelps reduce emission levels of oxides of nitrogen from the exhaust system. The system automatically injects diesel exhaust fluid into the exhaust system to enable correct selective catalytic reduction system function. Note: Selective catalytic reduction systems are not fitted to vehicles in markets where only high-sulfur diesel fuel is available. Diesel Exhaust Fluid Level In order for the system to operate correctly youmustmaintain the diesel exhaust fluid level. A warning message appears in the information display when the diesel exhaust fluid level is low. If a warning message appears, refill the diesel exhaust fluid tank as soon as possible. See InformationMessages (page 123). Filling the Diesel Exhaust Fluid Tank WARNINGS Keep diesel exhaust fluid out of reach of children. Avoid contact with skin, eyes or clothing. In case of contact with your eyes, flush immediately with water and get prompt medical attention. In case of contact with your skin, clean immediately with soap and water. If you swallowany diesel exhaust fluid, drink plenty of water, call a physician immediately.

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F-150(TFC)Canada/UnitedStatesofAmerica,enUSA,Editiondate:201709,SecondPrinting