Service bulletins for the 2021 Ford Bronco Sport
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.
188 on file from NHTSA, as of 2026-10-19.
About P0420 on the 2021 Ford Bronco Sport: what the code means, and the bulletins and recalls about the same components.
By type
By component
By trouble code
Only bulletins with trouble code: P0420 are shown. Show all
| TSB 23-2259 | 2023-09-01. Service bulletin. ENGINE AND ENGINE COOLING; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR. Some 2020-2022 Escape built and 2021-2023 Bronco Sport vehicles, built on or before 28-Sep-2022, equipped with a 1.5L Ecoboost engine and a 8F35 transmission may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P0420 stored in the powertrain control module (PCM). This may be due to the catalytic converter. To correct this condition, follow the Service Procedure to replace the catalytic converter. |
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| SSM 49996 | 2021-09-04. Service bulletin. ENGINE AND ENGINE COOLING. Some 2021 Bronco Sport vehicles equipped with a 1.5L EcoBoost engine may exhibit a no crank/no start start condition with an illuminated malfunction indicator lamp (MIL) and one or more of the following diagnostic trouble codes (DTC): P093B, P2282, P0420, P062B, P21D1, P21D0, P21CF, P0710, and/or P0712. This may be due to a damaged wiring harness at the transmission cover. If damage is found, repair as necessary. Refer to Wiring Diagram Cell 005. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.