Some 2017-2018 F-Super Duty/2016-2018 F650-750 with 6.7L diesel engines and 2015-2018 Transit with 3.2L...

Bulletin number

SSM 47110

Component

Engine and engine cooling: exhaust system

Summary

Some 2017-2018 F-Super Duty/2016-2018 F650-750 with 6.7L diesel engines and 2015-2018 Transit with 3.2L diesel engines may exhibit a MIL on with diagnostic trouble code (DTC) P206C in the powertrain control module (PCM). This may be due to incorrect diesel exhaust fluid (DEF) concentration. Prior to performing Powertrain Control/Emissions Diagnosis (PC/ED) pinpoint test RJ, confirm DEF concentration using IDS to monitor REDUCT_CONC_MES. This PID reading may fluctuate between 31% and 34% indicating DEF concentration is correct. A concentration reading below 28% will set P206C and cause vehicle derate. This reading may also be checked using Central Tools Refractometer (CEN3R201) which should indicate a similar percentage as the PID. Low concentration of DEF is not a warrantable condition. If low concentration is suspected, drain fluid and replace with known good DEF before replacing any parts.

Owners of these vehicles have filed 102 complaints in the engine category.