I finally had Kenny replaced Accord's Catalytic Converter this morning. The Check Engine Light (CEL) had been on for almost a month now. The new Honda Genuine Converter fits perfectly as it's supposed to, the only difference between the one came from the assembly line and the replacement parts is the rear O2 sensor placement point. The hole on the replacement is about a few inches back comparing to the original spot right at the middle of the converter.
I have replaced both front/rear O2 sensors about a few months back, but the CEL still came on, soon Kenny realized it's probably the converter had gone bad.
The weird thing is the converter shield from the assembly line has 1 extra hole. We didn't know what the hole was for at the time we replaced one of the sensors. The replacement sensor made by Denso came with a very long wiring harness (about more than double of the original size), which we didn't know why it was made so either since there was no apparent reason such long harness is needed. Now put everything together, it looks like Honda knew right from the start the converter with the rear O2 sensor plugged right in the middle would be a problem so they put an extra hole at the rear end of the shield for future converter replacement. This also indicates that Denso knew this was gonna happen, too, so they put a much longer harness just to fit the all-new Accord V6 replacement converters. Quite funny isn't it?
p.s. the converter i got is Honda Genuine Parts from Majestic Honda in Rhode Island, one of my cheap source to get Honda parts.
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