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P2459 on the 2019 Ford F-250

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.

Bulletins for this model year that name P2459
TSB 21-23672021-11-02. Service bulletin. Some 2018-2019 F-Super Duty vehicles equipped with a 6.7L engine may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTC) P2459, P245A and/or P259F stored in the powertrain control module (PCM). This may be due to the PCM software. To correct the condition, follow the Service Procedure to reprogram the PCM.
TSB 21-22232021-08-02. Service bulletin. Some 2018-2019 F-Super Duty vehicles equipped with a 6.7L engine may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTC) P2459, P245A and/or P259F stored in the powertrain control module (PCM). This may be due to the PCM software. To correct the condition, follow the Service Procedure to reprogram the PCM.
TSB 21-20742021-04-03. Service bulletin. Some 2018-2019 F-Super Duty vehicles equipped with a 6.7L engine may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) P208E, P2459, P245A and/or P259F stored in the powertrain control module (PCM). This may be due to the PCM software. To correct the condition, follow the Service Procedure to reprogram the PCM.
TSB 21-20522021-04-03. Service bulletin. Some 2017-2021 F-Super Duty vehicles equipped with a 6.7L diesel may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) P2459, P246C and/or P2463 with a Drive to Clean maintenance message. Vehicles operated primarily in a stationary or off-highway low speed use may exhibit frequent exhaust regeneration attempts. In these conditions, a vehicle may not easily allow for normal exhaust regeneration and may benefit from operator commanded regeneration (OCR) capability so it can perform complete exhaust regeneration in a stationary setting.

4 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.