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Discussion Starter · #1 ·
When I first bought my Insight, previous owner stated that it did occasionally throw a P1420 on long acceleration.

It happened a few months into my ownership. Went away on its own after a few cold starts. Seemed like a non-issue.

Now I'll clear the light and it'll come right back on when I'm on the freeway.

Cats bad? How can I be sure?

How would I go about checking with Honda if this car had the software update TSB?
 
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