Need 07 Pilot P0430 error code troubleshooting tips

Question edited for clarity.
Question moved to model category.

You say you 'changed the spark pug' (singular), did you only change one? When one fails, the rest are going to follow.

Your O2 Sensor and O2 Heater are probably the same sensor that is failing. When they fail and are running lean, they dump fuel and that soots up the Catalytic Converter, so there is your other code. Replace the sensor that is causing the issue and run some Extreme Clean Catalytic Converter Cleaner in the fuel. You might need two treatments.

You need a good auto electrician

https://www.google.com/search?q=auto+electrician+near+me

P0430 Code: Catalyst System Efficiency Below Threshold ...

CarParts.com https://www.carparts.com > blog > p0430-code-catalys...
Oct 29, 2021 - P0430 is a diagnostic trouble code (DTC) for "Catalyst System Efficiency Below Threshold (Bank 2)." The code warns about a problem with the ...

This is a good gadget if you want to take control of your own codes. It talks to an App on your Smart Phone. I have one.

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https://www.youtube.com/watch?v=0Q4wPfFXfp8 https://www.youtube.com/watch?v=0Q4wPfFXfp8 these links should assist with explaining and helping correct your problem

Christopher, BMW P0430 code catalyst efficiency fault, the converter is no longer able to do its job and may need replace.
Check the attached links very informative, instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
JE Robison Service Bosch Car Service Specialists the blog Those dreaded...
P0430 Replace the O2 sensor
P0430 P0420 Catalyst inefficiency do have to replace cats E46Fanatics
P0430 OBD II Trouble Code

this is the o2 sensor after the pre cat so post cat you can get a tune to get rid of code or replace the o2 sensor or get spacer that screws into the cat witch will make it not code the o2 sensor is there to just make sure the cat is there for emissions and will not effect the gas milage

P0430 is a catalyst efficiency code. If there are no leaks in the exhaust or any vacuum leaks that could affect O2 sensor operation and the O2 sensors are working properly then it's possible that you need a catalytic converter. If you have access to a scanner capable of reading live data plug it in and take the vehicle on the high way at a steady 55-60 mph. The O2 sensor should read somewhere around 700 mv give or take but should not fluctuate to much. If it does you need a catalyst bank #2. Good luck!

P0430 means you have trouble to emission. most likely at catalytic and 02 sensor, replacing plugs might help if it is not been replace for a while about 70k miles this might help your idling. if you have access to scanner check fuel short trim a higher trim indicate fault at upstream 02 sensors.

P0430 - Catalyst System Efficiency Below Threshold Bank 2. The most common cause it the three way catalyst converter Bank 2. Common Problems That Trigger the P0430 Code

• Defective Catalytic Converter
• Internal engine damage resulting in high oil consumption and/or a leaking Head Gasket has damaged the Catalytic Converter. P0430 OBD-II Trouble Code
  http://www.obd-codes.com/trouble_cod...old-bank-2.php
  
  the above site will explain in better detail. good-day !

Hi,
You need to have the fuel pressure checked, if this is ok you then need to check the valve clearances and once this is done then have the DTC rechecked.
If the P0172 code comes back then you need to check injector pulse timing and then replace the faulty injector.
Let me know if you need more information.
Thanks

Code P0430 - For Continuous Memory Only -- Check for missfire detection monitor (dtc) -- Bank 2 catalyst system effciency is below acceptable threshold -- possible causes are
-Faulty HO2S
-Faulty ETC sensor
- High Fuel Pressure
- Damaged exhaust components
- Oil Contamination
- Cylinder Missfire
- Downstream O2 sensor improperly connected
- Retarted Spark Timing
Most times the problem is the Downstream O2 sensor is defective

codes p0420 and p0430 are both post o2 sensors, the ones after the convertor, both sides if replacing