I tried using a fuel additive, as some had suggested. But that did not work for me. So I replaced the O2 sensors and the code went away. As many have said, the emissions settings are sensitive, so it might have gone away by itself. The minimum allowable threshold for cat efficiency is quite high. But my wife does not want to see any warning lights, so I took action.Engine light came on, my friend scanned the code, the code is p0430, catalytic converter bank 2. The car is out of warranty, do i really need a new converter ? Which side is bank 2 ?
I have done my best to maintain our 2005 Odyssey and it has been very good to us, overall. But components wear over time and no vehicle is perfect. We were cruising west on I-10 at 80 mph with about 215K on the odometer when the transmission suddenly dropped down from overdrive (5th) to 3rd. What a jolt as the engine revved up! Then it went back to 5th after a few seconds, dropped again and repeated as my wife slowed down and sought an exit. Had to rebuild the transmission at a cost of around $2500, but the van is in good shape and will last a lot longer.P0420 2001 odyssey
I bought my van at 89000 miles and when I got to 150000 I had code p0420 just like what everyone here is talking about. The code had been ON and OFF, some 10k-15k, some a few thousand miles. Now it has 222220 miles still with the original engine and transmission.
I have noticed that the P0430 code kicks on after I have disconnected the battery to work on the van. In that case it goes away on its own after a few days to a week, depending on your driving habits. This time, I have to replace the starter. The light popped on after a while, then it went away on its own after a few days without taking any action. I had replaced both pairs of O2 sensors just a year ago (upstream and downstream, banks 1 & 2) and I wasn’t aware of any other maintenance issues, such as a vacuum leak, that might throw that code. So I chose to wait and this time patience paid off on that somewhat finicky system.My 2005 Odyssey (231K) just threw a P0430 after being out of service for a few weeks (front end damage from a parking lot incident) and after filling up the tank. After adding a shot of Lucas fuel treatment (just in case bad gas) and taking a 3.5 hour trip to Austin and back the following day, the check engine light cleared. It probably would have cleared without the Lucas fuel additive, but I use it every few months, anyway.