catalytic converters

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Jan 31, 2023 | 10:53 AM

gjgogol

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catalytic converters

I have a 2013 Honda accord ex 4 cyl...I got a P042 code...I also just learned that I have TWO CATs (ugh), one in front and one under neath...how do i determine which CAT needs to be replaced?

Feb 1, 2023 | 06:39 AM

Ryanthegreat1

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Re: catalytic converters

P0420 is the primary cat right off the head.

Not sure the secondary cat is even monitored.

Feb 1, 2023 | 07:29 AM

gjgogol

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Re: catalytic converters

thank you!

Feb 3, 2023 | 09:24 AM

gjgogol

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Re: catalytic converters

would it be worth replacing the spark plug coils or would that be a waste of money?

Feb 3, 2023 | 09:28 AM

Ryanthegreat1

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Re: catalytic converters

Probably a waste of money unless you have a matching misfire code.

Feb 3, 2023 | 09:52 AM

gjgogol

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Re: catalytic converters

I also need to check for exhaust leakage and read about soaking exhaust pipe/joints with soapy water and then blowing air up the exhaust pipe...is that bad for the system?

Feb 9, 2023 | 02:18 PM

gjgogol

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Re: catalytic converters

I also learned I have two catalytic converters and notice that the front converter is between the two sensors. How is the back converter measured it at all?