1999 Honda Odyssey with 200k miles on 1999 Honda Odyssey

code po740 - tccd solanoid circut & code po420 cat. The cat has been change three times with an after market unit yet used all honda seals, bolts & connection parts. Car is shifting rough lately. After running on the highway, it runs great.

Asked by for the 1999 Honda Odyssey
1 answer
could be the converter clutch worn out with the mileage. nedd a diag to confirm
you cannot use aftermarket cats on hondas, only oem if you want it right.