New Owner / P0420 / Oil Splatter

[kennysmith]

Our 2003 HCH has the P1420. We took it to Honda to see if an update would clear it. They said no, but in the process cleared the code. We drove immediately across town and passed inspection. Within a few hours got the P1420 again. Maybe we were just lucky?

[matrix_tediz]

Well if that was luck, I wish I ran across that....

While I was driving the code came back. I was getting prepared to do the Sparkplug No Foul mod and drove again to heat up the upper Catalytic (didn't feel like using a torch) and my engine noise greatly increased. Sounded like the exhaust had a hole. And when I checked, I could feel air coming from the upper Cat. So I think it's time for a new one that is not rusting through.

Any good place I should buy an upper Cat....? Gaskets (AutoZone was a no-go for gaskets before knowing I needed to replace it)....?

~Mike
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2003 Manual Transmission Honda Insight

[Willie Williford]

Check the "doughnut" between the 1st cat and the next pipe going to the second cat.
HTH
Willie

[gilbertguy]

Originally Posted by matrix_tediz

.

Any good place I should buy an upper Cat....? Gaskets (AutoZone was a no-go for gaskets before knowing I needed to replace it)....?

~Mike
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2003 Manual Transmission Honda Insight

Here is a link to a thread that talks about replacement CATs.

Noob with questions on buying an Insight

[matrix_tediz]

Should have posted an update a long time ago. I wanted to add one picture, but never got around to it. Might as well update now than never.

Anyways, the lower flange did split completely off and my original cat is in two. I got another cat, the car passed emissions, and it is finally plated (yay).

After 6 weeks of driving, check engine light came back and this time it read P1420. Clearing the code, I was able to drive about 1K miles before it came back.

Since I have plates, I will not worry about that code for another two (2) years!

~Mike