December 20, 2023 Service bulletin

Illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTC) P061B, U0140, U3035...

Ford technical service bulletin TSB 23-2421 for 2023 Ford F-250 SD, 2023 Ford F-350 SD and 2023 Ford F-450 SD and others.

Bulletin number: TSB 23-2421
Component: Power train: automatic transmission: control module (TCM/PCM/tecm)
Summary: Some 2023 F-Super Duty vehicles equipped with a 6.8L or 7.3L engine may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTC) P061B, U0140, U3035 and/or U3036 stored in the powertrain control module (PCM). This may be due to the software in the PCM. To correct the condition, follow the Service Procedure to reprogram the PCM.

Owners of these vehicles have filed 11 complaints in the transmission category.

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