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Service bulletins for the 2021 Ford E-350

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

45 on file from NHTSA, as of 2026-10-19.

About P0420 on the 2021 Ford E-350: what the code means, and the bulletins and recalls about the same components.

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Only bulletins with trouble code: P0420 are shown. Show all

Bulletins, newest first
TSB 25-23822025-08-26. Service bulletin. POWER TRAIN. Some of the vehicles listed in the Model statement above may exhibit an incorrectly illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTC) P0420 and/or P0430 stored in the powertrain control module (PCM). This may be due to the software in the PCM.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.