Ford F-250 SD 2020 — technical service bulletin
Bulletin TSB 20-2074 · NHTSA communication 10172964 · issued Mar 12, 2020
Technical service bulletin
communication type
Power Train
component
2020
model years
4
vehicle entries
Official summary
Some 2020 F-Super Duty vehicles equipped with a 6.2L/7.3L gas engine and 10R140 transmission built on or before 5-Dec-2019 may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P27B4 stored in the powertrain control module (PCM). This may be due to various strategies within the PCM software. To correct the condition, follow the Service Procedure to reprogram the PCM.
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.