2011 Ford F150 Regular Cab Owner Guide 3rd Printing - Page 16

Instrument Cluster Powertrain malfunction/Reduced power/Electronic throttle control (RTT): Displays when the engine has defaulted to a "limp-home" operation or when a transmission problem has been detected and shifting may be restricted. If the light remains on, have the system serviced immediately by your authorized dealer. Check 4X4 (RTT) (if equipped): Displays with the message CHECK 4X4 when a four-wheel drive fault is present. Refer to Message center in this chapter. Brake system warning light: To ! P confirm the brake system warning light is functional, it will BRAKE momentarily illuminate when the ignition is turned to the on position when the engine is not running, or in a position between on and start, or by applying the parking brake when the ignition is turned to the on position. If the brake system warning light does not illuminate at this time, seek service immediately from your authorized dealer. Illumination after releasing the parking brake indicates low brake fluid level and the brake system should be inspected immediately by your authorized dealer. WARNING: Driving a vehicle with the brake system warning light on is dangerous. A significant decrease in braking performance may occur. It will take you longer to stop the vehicle. Have the vehicle checked by your authorized dealer. Driving extended distances with the parking brake engaged can cause brake failure and the risk of personal injury. Anti-lock brake system: If the ABS light stays illuminated or ABS continues to flash, a malfunction has been detected, have the system serviced immediately by your authorized dealer. Normal braking is still functional unless the brake warning light also is illuminated. 16 2011 F-150 (f12) Owners Guide, 3rd Printing USA (fus)