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catalytic converter

  1. The 7th Generation
    P0420. Comes back roughly every 500 miles after I clear it because the light bugs me. Read quite a bit of other posts about this but couldn't find a definite answer. I understand it's hard to know what actually is causing the code. After checking most things (exhaust leaks, cat temps, o2...
  2. General Drive
    Hello everyone. I'm new here so please correct me if I make any mistakes. I own a 2015 Accord EX-L with the 2.4 Earthdreams IL4, my significant other owns a 2016 HRV with the same motor. I previously owned an Element and she a CR-V. We both have had terrible luck with getting our catalytic...
  3. The 8th Generation
    I just bought a 2010 Accord (180k-mlz) It's throwing code for the cat and o2 censor. I'm out of $ for a job like this. I know it's frowned upon; but I was thinking I should just remove it temporarily so I can drive the car without killing it... I've never removed a cat before and because it's...
  4. The 7th Generation
    Hi everyone, New to the forum, been browsing around here since October of last year when I bought a 05 Coupe I4 AT. It had ~128k when I bought it, we've put about 2K on it since then. It was only being driven 1-2 times a week for short (<10 mile) trips until January of this year, when my...
  5. The 7th Generation
    Hi everyone - here's the story: I live in Ontario, Canada and there is a mandatory biannual emission testing. I have a 06 Accord 4-cyl (about 243K km) and for the longest time the check engine light would be on but intermittently it would go off. I know from using an Android app (Torque Pro)...
  6. The 8th Generation
    Maybe a simple question. I drive a 2008 Accord EXL 2.4 L auto. I have had very sluggish highway acceleration for about a month, while having a 0420 code (Cat Converter) that popped on and off for about two months prior to that. It is currently off and has not come on in 4 weeks. My engine has...
  7. Performance
    I just got PCDs install on my accord v6 5AT (J35Z2), after installation went for a drive and i noticed there is a rattle/rasp noise around 3k rpm. Not sure if this is common after PCD install, didn't have this type of noise when I only had magnaflow cbe and rv6 j pipe. All hardware to install...
  8. The 7th Generation
    I want to share my recent experience in case others run into the same issue on their 7th Gen Accord. The Short Story: If you have very low power and bad automatic transmission shifts (in particular very late upshifts during long accelerations) a clogged catalytic converter could be the...
  9. The Early Generations
    Whats up I recently bought my first car, a 97 accord. Its been great so far no problems, but its got a full ebay exhaust. Currently ive got a cheap header, no cat, a straight pipe with i think a resonator, and a $80 muffler. I want to end up with a clear deep sound, not like a stupid loud fart...
  10. The 9th Generation
    I was wondering if the exhaust manifold on the 2.4L 13-15 Accord's from the CVT's fit into the 6MT's engine? I can't tell if the header mounting bracket at the bottom is in a different position or whatnot. They technically should be the same, even with the different trim levels (LX, Sport, EX)...
  11. The 9th Generation
    As the title states, I''m going to gut the cats in my exhaust manifold/header/downpipe, and also gut the cats in the secondary cat. I don't know if the piping below the exhaust manifold has cats in it itself, but I am trying to get ahold of a used exhaust manifold and secondary cat, so I can...
  12. Problems & Solutions
    Hello everyone, I am new to post but have used this site for information for years. The only car I have ever owned is my 4 cyl 07 accord and I love it. I have done all the maintenance myself and it is up to 101,000. Up until now I have had no issues. About 2 months ago my car was showing a code...
  13. The 6th Generation
    Hey guys. Recently bought a 98 Accord LX 2.3L 4 cylinder automatic for the girlfriend. 177k miles on the car and about 100k on the engine. The car seemed to be in decent shape, definitely an upgrade from her ol' 95 Geo Prizm squealing rust bucket. Started doing some general tune-up stuff...
  14. The 7th Generation
    At 313K miles (2007 4CYL Accord SE) my check engine light came on. There was a single DTC: P0420 Catalyst System Efficiency Below Threshold Generally speaking this code indicates a bad catalytic converter, but I went through some diagnosis to try to make sure before buying an expensive...
  15. The 7th Generation
    I just got a new Magnaflow direct fit cat for my 05 2.4. I had to cut the old bolts off and am seeking advice on what bolts to get and where to get them. any recommendations or advice on replacing my cat?
  16. The 6th Generation
    Sooo I'm hoping someone can shed some light on my situation. I have a 2000 Honda Accord Coupe, 4cyl manual transmission. I have 208k miles (an oldie but goodie car) I've replaced just about everything on this car and it's still running nicely...aside from the CEL (check engine light)...
  17. The Early Generations
    My check engine light came on, I went and got it checked turned out to be a po420 code. They (pep boys) didn't do a full diagnostic. They said they'd check it for $65. I was wondering if anyone has any suggestions or recommendations or know what the problem might be so I can kind of guide the...
  18. The 8th Generation
    Hey guys. I've had the idea of removing my cats for awhile now and because summer's around the corner, its time for me to make the decision. I was wondering if anyone here has deleted their cats before? (Yes i know you need them for the emissions test. Yes i know it'll be a hassle to put on and...
  19. The 7th Generation
    New to the forum and recently bought an '03 Accord with California Emissions. I live in the EasT Coast. P0420 code pops up so I replaced the o2 sensor with a Denso 234-4363 Oxygen Sensor, which is a California legal o2 sensor. CEL came back on and did some thermo tests on cat, found out it was...
  20. The Early Generations
    i have a 95 accord lx manual 4cyl, and am starting to make some modifications, but I'm new to the art. For sure I am getting a c.a.i. to help it breathe, but I'm less sure about exhaust. New headers seem necessary, but after that would I need a whole new exhaust system to get rid of...
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