Greetings: I have a 2006 Toyota Corolla CE. I am in need of a new catalytic converter to pass my upcoming PA state inspection. That had actually been diagnosed some months ago via computer code. At my latest visit to the local garage, they indicated to me that I would need a new air intake sensor, …

I was going to ask you question number 2. What, if anything, is the difference? I’ve never heard of a catalytic converter assembly. It’s very unusual for a car this new to need a catalytic converter. Often a malfunctioning cat will work correctly with replacement of the O2 sensors or some other,…

if you do need a catalytic converter why isn’t it being replaced under warranty?

7 years or 80k miles and the dealer will replace it free.

The assembly probably includes the flex pipe and tail as a complete assembly. It’s very difficult to replace only the cat on some welded systems due to space constraints. The cost of labor will quickly exceed the cost of the whole assembly if they have to take things out, cut it apart, fixture it, w…

The actual diagnostic code is P0420. And, what I referred to as the “air intake sensor”, is actually called the “mass air flow sensor” on the mechanics’ sheet. Thanks!

With that many miles on the car, I would start with the MAF sensor, and also replace the Oxygen Sensors first, and see if the P0420 code goes away. It will save many many hard earned dollars if it resolves the issue. BC.

Does anyone know, would the O2 sensors be considered part of the catalytic converter assembly, or separate parts?

An O2 Sensor Screws Into The Converter Or Exhaust System. It Is A Small Part. CSA

Toyota Corolla Catalytic Converter Assembly

Maintenance/Repairs

dgarlin May 9, 2011, 6:00pm 7

Oh, one other thing, regarding warranties … I have 158k miles on the car.

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Toyota Corolla Catalytic Converter Assembly

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