Ford Mustang 2018–2019 — technical service bulletin
Bulletin TSB 19-2201 · NHTSA communication 10164469 · issued Aug 6, 2019
Technical service bulletin
communication type
Power Train
component
2018–2019
model years
2
vehicle entries
Official summary
Some 2018-2019 Mustang vehicles equipped with a 5.0L engine may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P0420 and/or P0430. This may be due to the operation of the PCM. To correct the condition, follow the Service Procedure steps to replace the affected catalytic converter and reprogram the powertrain control module (PCM).
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.