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p0420

  1. Honda Insight Forum 1st-Gen Discussion
    So, I'm getting the dreaded P0420 code on my 2001 (M/T) Insight and have been getting noticeably lower mileage for the past few months. Wanted to know what my options are. I'm approaching 260K miles, and am not really aware of much about the car's previous life (don't have the previous owner's...
  2. Troubleshooting and Problems
    Hi, I am a newbie to this community and is seeking advice. I live in California and just bought a 2010 Insight EX with 157K miles and saw the emission warning light after driving the car for just 2 days. I have a feeling the previous owner knew this and is the reason for selling the car...
  3. Honda Insight Forum 1st-Gen Discussion
    The check engine light came on. Code pulled as P0420. They reset it to make sure it wasn't an error. Came back on. My gas mileage has dropped 1MPG over the last few months. I was told I'd need to replace the cat. The repair guy said I could try the "laquer Thinner" technique by mixing it...
  4. Honda Insight Forum 1st-Gen Discussion
    So I admit it... I'm 13 years behind the times. I bought a 2000 Insight (red) in Oct of 2013. I've always wanted one, now I (finally) own one. The first 2 months were amazing. I went head first into hypermiling & on my 22 mile commute to work averaged 94mpg once & over 80mpg multiple times...
  5. Problems and Troubleshooting
    Just weeks after shelling out $ for a new IMA battery, the CEL (check engine light) just came on with a P0420 code which the dealer says sight unseen must mean cat replacement. If it is the cat, is it harmful to drive the car? Anybody have the ECM update or replacement done beyond the warranty...
  6. Honda Insight Forum 1st-Gen Discussion
    Howdy all! Recently I acquired a 2003 Manual Transmission that has been sitting at an auction lot for a few months. After driving about one hour the check engine light came on and AutoZone read the P0420 code. I do have to pass emissions and after reading a little I imagine the next steps will...
  7. Problems and Troubleshooting
    Loooong time lurker, first time topic-starter. Huge fan of this site. This morning I started my 2000 Insight (vin 02217) and noticed the IMA light was on. This is the first time I've seen that light, I bought the car used 18 months and 12,000 miles ago from the only previous owner. About 2...
  8. Problems and Troubleshooting
    I was getting repeated P0420 codes, I asked the dealer to confirm the diagnosis, dealer told me I needed the front CAT. Having no income right now, I got a reman from smithcat.com and put it in, reset the codes, ran the "idle learn" procedure. The P0420 came back after about 30 miles. Just to be...
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