February 20, 2020 Service bulletin

Some 2018-2020 F-150 vehicles equipped with a 5.0L engine may exhibit an illuminated malfunction indicator...

Ford technical service bulletin SSM 48573 for 2018-2020 Ford F-150.

Bulletin number: SSM 48573
Component: Engine and engine cooling
Summary: Some 2018-2020 F-150 vehicles equipped with a 5.0L engine may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) P0172, P0173, P0174 and/or P0175. This may be due to incorrect flex fuel learning, which is often caused by customer refueling habits or a stuck open evaporative emissions purge valve. Refer to pinpoint test H in the Powertrain Control/Emissions Diagnosis (PC/ED) Manual for diagnostics and Flex Fuel GSB for additional flex fuel system information and diagnostic tips.

Owners of these vehicles have filed 1,109 complaints in the engine category.

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