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原文传递 WHO 'KILLED THE CAT?': EXAMINING THE ROOT CAUSE OF P0420/P0430 FAILURES

题名：	WHO 'KILLED THE CAT?': EXAMINING THE ROOT CAUSE OF P0420/P0430 FAILURES
正文语种：	eng
作者：	CHRIS FARLEY
作者单位：	Automedic LLCs
摘要：	I promise, no pets were harmed in the writing of this article. Wait! What? That car I replaced a catalytic converter in last month... is it back with a P0420 (again)? It must be that inferior quality part you ordered. Oh! Did we get an OEM cat? Umm... We have all been there. So, let us talk about how to handle it, or better yet, what to do so we do not get there in the first place. Both P0420 and P0430 are ranked #1 and #2 on the "top-10 most common OBD codes stored" for years. With these statis- tics, we need to sharpen our skills to get these faults diagnosed fast and accurately. Catalytic converters consist of a body/ shell typically composed of stainless steel. The inner core is made up of a substrate, a ceramic monolith core with a honeycomb design to maximize the surface area the exhaust gases must pass over (Figure 1). The substrate is dosed in a wash coat, which consists of numerous chemicals and elements. These initialize the catalytic reactions that chemically alter the harmful exhaust gases to less harmful gases. The precious metals we always hear about in the converters may consist of rhodium, platinum, palladium, cerium, and nickel.
出版年：	2023
期刊名称：	Motor age
卷：	142
期：	1
页码：	18-20,22,24