Ford Bronco Sport 2020–2023 — technical service bulletin
Bulletin TSB 23-2259 · NHTSA communication 10241542 · issued Aug 16, 2023
Technical service bulletin
communication type
Engine and Engine Cooling
component
2020–2023
model years
6
vehicle entries
Official summary
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.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.