P0430 what do I do?

Does this mean I need new cats? Thanks.

 

Help?

 

Get it properly diagnosed. P0430 is usually associated with another problem. Not always…but a proper diagnosis will be much cheaper than throwing cats on a truck without diagnosing first. Could be anything from low fuel pressure, bad spark plugs, bad coils, bad injectors, bad O2 sensors, wiring problems, rodent damage, bad MAF sensor, clogged air filter, dirty throttle body, bad cat(s) and/or poor fuel quality.

 

Thanks for the info. I’ll take it for a diagnosis tomorrow.

 

Check if you leak exhaust on drivers side.
Then need to check upstream and downstream O2 sensors

Edit. see attached. Need a scanner to diagnose

 

How can I check for this ? Like if liquid comes out of my exhaust ?

 

soupy water applied in this area?

Read up on the description of the process of setting up the code. Most likely the heated sensor is having issues. Check connector/wiring.

 

Thank you.

 

O2 sensor having an issue. My 03 Tundra would toss codes every 100k miles like clock work. Easy fix and replace with nothing but Denso.

 

I've seen exhaust leaks cause this, but typically its cats, you need to monitor the o2 sensors and compare readings.

It's basically never o2 sensors themselves, p0430 means they are functioning.

 

How many miles on truck? My OEM cats started to fail around 245k

 

How is the fuel supply in Lebanon? Is it truly unleaded?