2018-F150-Owner's Manual

Maintenance

Note: Driving your vehicle without repair increases the chance of engine damage. Engine Coolant Temperature Management (If Equipped) WARNING To reduce the risk of crash and injury, be prepared that the vehicle speed may reduce and the vehicle may not be able to accelerate with full power until the coolant temperature reduces. If you tow a trailer with your vehicle, the engine may temporarily reach a higher temperature during severe operating conditions, for example ascending a long or steep grade in high ambient temperatures. At this time, you may notice the coolant temperature gauge moves toward the red zone and a message may appear in the information display. You may notice a reduction in vehicle speed caused by reduced engine power in order to manage the engine coolant temperature. Your vehicle may enter this mode if certain high-temperature and high-load conditions take place. The amount of speed reduction depends on vehicle loading, grade and ambient temperature. If this occurs, there is no need to stop your vehicle. You can continue to drive. The air conditioning may automatically turn on and off during severe operating conditions to protect the engine from overheating. When the coolant temperature decreases to the normal operating temperature, the air conditioning turns on.

When Fail-SafeMode Is Activated WARNINGS Fail-safe mode is for use during emergencies only. Operate your vehicle in fail-safemode only as long as necessary to bring your vehicle to rest in a safe location and seek immediate repairs. When in fail-safe mode, your vehicle will have limited power, will not be able tomaintainhigh-speedoperation, and may completely shut down without warning, potentially losing engine power, power steering assist, and power brake assist, which may increase the possibility of a crash resulting in serious injury. Never remove the coolant reservoir cap when the engine is running or hot. Your vehicle has limited engine power when in the fail-safe mode, drive your vehicle with caution. Your vehicle does not maintain high-speed operation and the engine may operate poorly. Remember that the engine is capable of automatically shutting down to prevent engine damage. In this situation: 1. Pull off the road as soon as safely possible and switch the engine off. 2. If you are a member of a roadside assistance program, we recommend that you contact your roadside assistance service provider. 3. If this is not possible, wait a short period for the engine to cool. 4. Check the coolant level. If the coolant level is at or below the minimummark, add prediluted coolant immediately. 5. When the engine temperature cools, you can re-start the engine. Have your vehicle checked as soon as possible to minimize engine damage.

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