p0420code cel and running rough

rasta

New member
2000 tr4 5 speed. v6. cel light on, seems like its missing, some popping from exhaust. all plugs are ok and not fouled. the front driver side i believe #2 cylinder plug was alittle wet. is this a o2 sensor failing? is there a resistance check i can do on the coils? thanks for any help
 
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