2004 ES330 P0430 code
#1
Pit Crew
Thread Starter
2004 ES330 P0430 code
Bunch of lights came on the other day and got the code for P0430. I cleared them and hasn't come back since but I know that won't last. I wondering if this means the O2 sensor is going or the Catalytic converter is going? O2 not big deal to change but if bank 2 is the rear of the engine, that catalytic converter is going to be a pain to change. BTW car has 172k miles.
#3
Pole Position
We got this code this fall when she took the car on a road trip to Oregon and got a bad tank of gas; the car ran rough on it and then constantly threw the code. Toyotas will throw this code when cat efficiency is below like 95% of design. This is a WAY higher threshold than other cars or needed for emissions. Very frustrating.
My suggestion is do nothing unless it comes back. if it does, put spacers on the (spark plug non-foulers) upstream side and be done with it.
http://www.amazon.com/Dorman-42009-S.../dp/B000CO91FY
You need to drill out the ends of these, instructions widely available. This will not violate emissions output levels but will calm the insane Toyota OBDII trigger.
My suggestion is do nothing unless it comes back. if it does, put spacers on the (spark plug non-foulers) upstream side and be done with it.
http://www.amazon.com/Dorman-42009-S.../dp/B000CO91FY
You need to drill out the ends of these, instructions widely available. This will not violate emissions output levels but will calm the insane Toyota OBDII trigger.
#4
Lexus Test Driver
It could be the 02 sensor, my RX300 threw this code once and replacing the sensor after the CAT did the trick. It's also one of the cheaper 02 sensors, well under $100 on the RX.
#5
Pole Position
I forgot to mention, there is a very simple way to test O2 sensors before just changing one on a suspicion. Put them in a vice, but a meter set to DC mV on the power wire and other lead to ground. When heated with a torch to cherry, you will see the voltage fluctuate rapidly between .1 and 1V ~ ish. You can google the proceedure to check my memory; I haven't done one in a while.
#6
Pit Crew
Thread Starter
How to Diagnose Codes P0420 & P0430 - YouTube
how is the car running and has the fuel efficiency dropped?
how is the car running and has the fuel efficiency dropped?
I could just use a laser thermometer I have to test the cat.
BTW Oro this is the video I think you're talking about.
#7
Pit Crew
Thread Starter
I measured the temp on the catalytic converters and got 300F before cat and 350F after. The O2 sensor was 450F after cat. Hard to measure temperature cause the cat sits right on the exhaust manifold which reads over 500F. The front is also 300F before cat and 350 after cat.
Last edited by Dukenukemx; 12-28-15 at 09:45 AM.
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