Ford F-250 SD 2023 — technical service bulletin
Bulletin TSB 24-2055 · NHTSA communication 10252530 · issued Mar 7, 2024
Technical service bulletin
communication type
Power Train
component
2023
model years
4
vehicle entries
Official summary
Some 2023 F-Super Duty vehicles equipped with a 6.7L engine may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P20A5 stored in the powertrain control module (PCM). This may be due to the software in the glow dosing module (GDM) and does not affect vehicle operation. Due to on-board diagnostic (OBD) functionality, the GDM may be referred to as the secondary OBD control module (SOBDMC) in the Ford Diagnosis and Repair System (FDRS) scan tool.
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.