Comments on: P0430 Code (Symptoms, Causes, and How to Fix)

By: Sean

Sean — Mon, 05 Dec 2022 17:14:01 +0000

In reply to Kellie. I wonder if you might have an exhaust leak somewhere. Is your car excessively noisy, particularly when you accelerate?

By: Kellie

Kellie — Sun, 04 Dec 2022 16:12:20 +0000

I have a 2016 Honda Pilot. Code P0430 has come on twice, but then goes away. I’ve noticed it comes on when temps drop below 20 degrees, and then goes off when temp warms back up. Any ideas what might cause this?

By: Sean

Sean — Thu, 03 Mar 2022 17:24:05 +0000

In reply to Dan. If the vehicle is under warranty I would have the dealership technicians take a look at it. They often have access to more specialized tools and diagnostics equipment that would help them better understand the problem. If this is a widespread issue on this particular vehicle, chances are they've seen the failure before and know what to do.

By: Dan

Dan — Wed, 02 Mar 2022 00:13:20 +0000

I have a DTC P0430 and have had both catalytic converters and all O2s replaced. After a few days, maybe 2 or 3 drive cycles the check eng light returns with same DTC PO430. I have had a warranty replacement of both cats and all O2s once and stand to have cats warrantied again. After all this work done I asked the tech what test were done to verify that the cats and O2s were in need of replacement, he stated the check eng light on they read the DTC to be PO430 and therefore replace the cats and O2s. Now I am doing what I should have done originally and go to a dealership to find out exactly how the Catalytic System functioning to set a DTC.