Question about 1998 Honda Accord

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Check engine light

I hooked it to a scanner and got two codes.(P0420 catayst efficeincy below threshold)and (P1739 manfacturer control transmission) what does this mean?

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  • jshmwiseman Jan 17, 2009

    I have a 1998 Honda accord EX V6 with 178,000 miles and my check engine light just came on. The codes from the scan were the same (P0420 and P1739). My dad is wondering if maybe changing the transmission fluid (which was last done at about 100,000 miles) or changing plugs would maybe fix the problem. I am just wondering if you fixed your problem and what the solution was.

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If you have undser 80,000 miles the convert. will be covered under warr. the other code is a possible need trans replacement

Posted on Dec 30, 2008

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