P23B5 on the 2023 Ford F-650
The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.
Nobody has written a description of this code yet.
| SSM 51791 | 2023-07-18. Service bulletin. 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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| SSM 51750 | 2023-06-30. Service bulletin. Some 2023 F-Super Duty vehicles equipped with a 6.7L engine, and built on or before 02-May-2023, 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. |
2 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.