SSM 50636

Service Bulletin Details

Public Details for: SSM 50636

2011-2022 f-super duty and 2016-2023 f-650/f-750 vehicles equipped with a 6.7l engine may exhibit an elevated idle condition. During prolonged idle time, vehicles may experience this elevated idle to reduce unburned hydrocarbons from the sc


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SSM 50636 - 2011-2022 F-Super Duty, 2016-2023 F-650/F-750 –
High/Elevated Idle After Extended Idle Periods – Selective Catalyst Reductant
(SCR) System
2011-2022 F-Super Duty and 2016-2023 F-650/F-750 vehicles equipped with a 6.7L engine may
exhibit an elevated idle condition. During prolonged idle time, vehicles may experience this elevated
idle to reduce unburned hydrocarbons from the SCR. The powertrain control module estimates
hydrocarbon levels in the SCR and may increase idle speed to remove them. Idle speed will be
increased to 1000 RPM for ambient temperatures near 26°C (80°F) and may increase to 1200 RPM
at -40 °C (-40°F). Vehicles may exhibit exhaust smoke and diesel exhaust fluid smell during elevated
idle condition. Exhaust smoke and smell condition will not affect reliability or durability of the engine.
Power take-off (PTO) use and idle set point control will disable elevated speed. It is required that the
operator monitor the vehicle and adhere to any Exhaust Filter warning messages.
APPLICABLE VEHICLES
2017 - 2021 TRUCK: FE P558N SUPER DUTY
2011 - 2016 TRUCK: FA P473N SUPER DUTY
2016 - 2019 TRUCK: BC H567N MEDIUM TRUCK
2021 TRUCK: BC H567N MEDIUM TRUCK
2016 - 2019 TRUCK: BC H567N MEDIUM TRUCK
2021 TRUCK: BC H567N MEDIUM TRUCK
2016 - 2019 TRUCK: BC H567N MEDIUM TRUCK
2021 TRUCK: BC H567N MEDIUM TRUCK
2022 - 2023 TRUCK: BC H567N MEDIUM TRUCK
2022 - 2023 TRUCK: BC H567N MEDIUM TRUCK
2022 - 2023 TRUCK: BC H567N MEDIUM TRUCK
2022 TRUCK: FE P558N SUPER DUTY


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