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1999 Honda Odyssey Question: 1999 Honda Odyssey with 200k miles



easyfix, 3.5L V6, Lagrangeville, NY, September 08, 2010, 10:20

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.

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  • Answer #1

    September 08, 2010, 10:25

    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.


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