Help! Check Engine Light on. P0430 Code

panicjam · Aug 30, 2014

Hi,
My 2004 Camry 3.3 V6 (3MZ-FE) has started to run a bit sluggish at highway speeds and sometimes in stop and go traffic.
This P0430 code came on after a recent oil change and flushing my engine with seafoam.

The info I've gotten from my auto parts store is that it's one of the oxygen sensors, HO2S or Bank 2. I believe, if my research is correct, that this sensor is post cat. Looking down from the front of my engine I can see 2 sensors after the cat pretty close to each other.

Can anyone tell me which one I should replace? They looked to be only about 8 inches apart. Is there anyway to test them or should I just replace each one? Could this failed sensor be the cause of my engine running a bit sluggish? Thanks

cammy1982 · Aug 30, 2014

Hi, I have the same problem with my 2006 Toyota Camry XLE V6 3.0L. Any expert here please help if the sensors are bad. And which one should replace? Does the item from Amazon is the right one?

panicjam · Sep 3, 2014

Additional information that I have received is that the P0430 code is the "Heated Oxygen Sensor Bank 2". What I'm confused about, is Bank 2 the front side, meaning the front of the engine or the rear side, being the firewall side? Thanks

cj1 · Sep 3, 2014

Reset error code. Maybe contaminates from flush.

hardtopte72 · Sep 3, 2014

Bank 2 is the front bank (radiator side). However a P0430 is a Catalyst Efficiency code. It could be the Bank 2 Sensor 2 (post cat) sensor or it could be a contaminated catalytic converter.

To be sure you would need to measure out the O2 sensor readings using a graphing scan tool.

Then from there you can replace the sensor OR you can do the antifouler mod to extend the sensor out and fool the ECU.

scubacat · Sep 4, 2014

How old are your spark plugs? Are they iridium extended life or performance?

knock703 · Sep 7, 2014

I would agree with 'scubacat' & 'cj1'; replace your sparkplug and reset the ecu. If it still comes up, shake the catalytic converter. If it sounds like sands / rock in it, you will have to replace the top and bottom catalytic converter and sensors (2 upstream and 2 downstream).

Help! Check Engine Light on. P0430 Code

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