I have replace both my air ratio sensors I have replace my bank 2 catalytic converter as well and code won't go away and my 02 Sensors seem to be reading just fine any suggestions??

 

P0430 is a defective or ineffective catalytic converter. The front and rear O2 sensors have determined that the catalyst is not scrubbing correctly. If you had a lazy or defective O2, you would get an O2 related code, not a P0430. For the P0430 monitor to run, both up and downstream O2's must be working correctly.

It seems likely that you have installed a non-OE converter (aftermarket cheapo), or replaced the wrong converter.

You need to provide more information. Engine size? Modifications? Mileage? When did it start? Etc. You want answers, I need information.

 

I have 200,000 on it v6 j30 with no mods I took it to Midas and they replaced the cat I had a rattle that shows the cat is no good and stuff now that rattle is gone. And that p0430 code was on for months I just couldn't afford to replace it until recently

 

A rattle does not indicate a bad converter necessarily. Most exhaust noise is caused by loose heat shields (very common on Honda vehicles). If you came in with a P0430, then yes, a converter is required.

A LOT of technicians, especially those in exhaust shops, will attempt to sell you repairs like this. Did you have the converter replaced because of a DTC code, or noise alone?

Whoever replaced those sensors, if they were replaced prior to the converter, ripped you for a lot of money. O2 sensors are not like spark plugs, they are only serviced as they fail. (Merlin recommends new fuel pumps are 50K miles..... really??)

 

I replaced my air ratio sensors after I replaced the cat I took it to honda today they're scanner said it needs bank 2 cat and I replaced it because of the code could it be Midas installed a bad cat? Or could it be they installed the wrong one? Honda said cats don't look new but I was there when they changed them out

 

How much was the Midas cat? A $200 or $300 cat either will not turn the light off or will only turn the light off for a short amount of time. You need a proper catalyst to keep the light off.

(Assuming all else is functioning normal,fuel control etc.....)

 

So whats the deal here with cats? Are you guys suggesting going to Honda and buying one flat out then taking it to the shop. When I called for my 90 Civic DX they fricken wanted $960!!!!

 

Dealer cats are more expensive because they must last,at the very least,through out the federal warranty period.(7 years)

In order to achieve this,they are loaded with precious medals. Platinum,Palladium,Cerium,etc. This stuff is expensive. Lesser(cheaper) cats are loaded less and are less effective, in some cases they are not even good enough to pass the vehicles PCM tests ,even if they are brand new and result in a check engine light.


There IS an alternative, and those are CA certified cats. They have a 5 year warranty and are usually cheaper than dealer cats. If there is a CA (California) certified cat available for your car,that is the best bet for keeping the light off and passing an emissions test.