2023 FORD SUPER DUTY Owners Manual

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FORD SUPER DUTY 2023  Owners Manual If the DEF tank is frozen, it may notrecognize when the tank is refilled. The DEFlevel will update once the tank thaws out.It is best to fill the DEF tank prior to, or aftera drive cycle greater than

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FORD SUPER DUTY 2023  Owners Manual 4.Remove the diesel exhaust fluid tankfiller cap.
Note:The diesel exhaust fluid tank has ablue filler cap.
5.Insert the spout into the filler neck untilthe seal on the spout fully seats.
6.Pour the fl

Page 235 of 738

FORD SUPER DUTY 2023  Owners Manual The warning lamp illuminates and amessage appears in the informationdisplay if the system becomescontaminated or inoperative.
SELECTIVE CATALYTIC REDUCTION SYSTEM – INFORMATIONMESSAGES
ActionMessage

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FORD SUPER DUTY 2023  Owners Manual ActionMessage
The selective catalytic reduction system detects a fault.  Thevehicle’s top speed will become limited upon restarting.  Haveyour vehicle checked as soon as possible.
DEF Fault Speed Li

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FORD SUPER DUTY 2023  Owners Manual WHAT IS THE CATALYTIC
CONVERTER
The catalytic converter is part of yourvehicle's emissions system and filtersharmful pollutants from the exhaust gas.
CATALYTIC CONVERTER
PRECAUTIONS
WARNING: Do no

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FORD SUPER DUTY 2023  Owners Manual AUTOMATIC TRANSMISSION
PRECAUTIONS
WARNING: Apply the parkingbrake, shift into park (P), switch theignition off and remove the key beforeyou leave your vehicle. Failure to followthis instruction could

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FORD SUPER DUTY 2023  Owners Manual MANUAL (M)
In manual (M) you can select a specificgear. See Manually Shifting Gears (page235).
Note:We recommend using this mode fordriving on hilly or mountainous roads orwhen towing a trailer. See T

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FORD SUPER DUTY 2023  Owners Manual Manually Shifting Gears in Manual(M)
Use this feature to select a specific gear.
Note:We recommend using this feature forengine braking, driving on hilly ormountainous roads, or when towing a trailer.