Some 2020-2021 F-Super Duty vehicles equipped with a 6.7L engine and built on or before 10-Feb-2021 may...

Bulletin number

TSB 21-2056

Component

Power train

Summary

Some 2020-2021 F-Super Duty vehicles equipped with a 6.7L engine and built on or before 10-Feb-2021 may exhibit an illuminated powertrain malfunction indicator (wrench) lamp with only diagnostic trouble code (DTC) P07F6 stored in the transmission control module (TCM). The vehicle may also exhibit harsh engagements, poor shift quality and/or loss of 9th gear as a result of the DTC being set. This may be due to the software in the TCM. To correct the condition, follow the Service Procedure to reprogram the TCM.

Owners of these vehicles have filed 174 complaints in the transmission category.