SSM 51791

Service Bulletin Details

Public Details for: SSM 51791

Some 2023 f-super duty vehicles equipped with a 6.7l engine may exhibit an illuminated malfunction indicator lamp (mil) with diagnostic trouble codes (dtc) U029D, U029E, U02A1, U02A3, P2209, P24D0, P22A7, and/or P23B5. This may be due to a


- 2023 -

Models from 2023
2023 FORD F-250 SD
2023 FORD F-350 SD
2023 FORD F-450 SD
2023 FORD F-550 SD
2023 FORD F-600 SD
2023 FORD F-650 SD
2023 FORD F-750 SD 
SSM 51791
2023 F-Super Duty - 6.7L - Illuminated MIL With Various NOx System
DTCs
Some 2023 F-Super Duty vehicles equipped with a 6.7L engine may exhibit an illuminated
malfunction indicator lamp (MIL) with diagnostic trouble codes (DTC) U029D, U029E, U02A1,
U02A3, P2209, P24D0, P22A7, and/or P23B5. This may be due to a wiring chafe on harness 14406
near connector C146 touching the exhaust gas recirculation (EGR) cooler on the right side of the
engine. Before performing normal diagnostics, inspect 20 amp fuse F18 (position 26). If fuse F18 is
found open, inspect the 14406 harness for contact with the EGR cooler and repair as necessary.
Refer to Wiring Diagram, Cell 005 for repair procedures. If no damage is found, refer to Workshop
Manual, Section 303-08A for normal diagnostics.

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