Some 2018-2019 Ford Mustangs equipped with a 5.0L engine and automatic transmission, and built on or before April 23, 2019, may exhibit a MIL on with DTC P0420 and/or P0430. This may be due to the operation of the PCM.
Replace the affected catalytic converter per the DTC. Reprogram the PCM using the latest available software.
PARTS NEEDED
W712334-S440............strut tower brace nuts (four)
W714878-S450............steering shaft bolt
GR3Z-9448-D...............left exhaust manifold gasket
W714870-S430...........left exhaust manifold nut (eight)
W714869-S431.......left exhaust manifold stud (eight)
5G232.....................left exhaust manifold and catalyst assembly
W705443-S900.......right catalyst to exhaust manifold nut (two)
BR3Z-5B266-A........right catalyst gasket
5E212.....................right catalyst (refer to VIN for both catalysts)
