2007 Honda Civic Hybrid Sedan 4D (Silver) -255,700 miles- has P0420.
I have never bought a car in my life and I bought this one just 10 days ago with the check engine light on. Apart from having to spend $35 to remove the rusty exhaust cover that was making weird noises after I scraped the bottom, I haven’t had to spend any money on it for mechanical reasons. And $35 was certainly too expensive for that 10 min labor, in my opinion. After that, I decided to get a $27 OBD2 scanner from Walmart and found that it was p0420. I erased the code while experimenting with the scanner. Having not had driven much in the past, I scraped the bottom again 2 days ago a and the check engine light came right back on. I have driven close to 300 miles since. The car continues to work just fine. No irregular noises that I (a rookie owner) am aware of. My research has showed me that it could be issues with leaks in the exhaust or oxygen sensors or catalytic converter(s). Should I do anything about it?
Why do you keep scraping the bottom of your car? Are you addicted to speed bumps?