2013 Ford F350 Super Duty Super Cab Owner Manual Printing 3 - Page 313

312 Maintenance You may notice a reduction in the vehicle's speed caused by reduced engine power. Your vehicle has been designed to enter this mode if certain high temperature/high load conditions take place in order to manage the engine's fluid temperatures. The amount of speed reduction will depend on the vehicle loading, towing, grade, ambient temperature, and other factors. If this occurs, there is no need to pull off the road. The vehicle can continue to be driven while this message is active. The air conditioning may also cycle on and off during severe operating conditions to protect overheating of the engine. When the engine coolant temperature decreases to a more normal operating temperature, the air conditioning will turn on once again. If you notice any of the following: • the engine coolant temperature gauge moves fully into the red (hot) area • the coolant temperature warning light illuminates • the service engine soon indicator illuminates 1. Pull off the road as soon as safely possible and place the vehicle in P (Park). 2. Leave the engine running until the coolant temperature gauge needle moves away from the H range. After several minutes, if this does not happen, follow the remaining steps. 3. Turn the engine off and wait for it to cool before checking the coolant level. WARNING: Never remove the coolant reservoir cap while the engine is running or hot. 4. If the coolant level is normal, you may restart your engine and continue on. 5. If the coolant is low, add coolant, restart the engine and take your vehicle to an authorized dealer. See Adding engine coolant in this chapter for more information. Refer to fail-safe cooling for additional information. 2013 F-250/350/450/550 (f23) Owners Guide gf, 3rd Printing, December 2012 USA (fus)