Quote:
Originally Posted by HondatechAV6
you can't pass emissions, even if the light turned on, then turned off... but if the light came on with p0420 - you need to replace the exhaust manifold/cat and update the pcm... most likely it will keep the light off though.
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Sorry. Not accurate. My light was on with a p0420 as tested by the local Honda dealership in Austin, Texas. They quoted me what would have been $3000.00 with tax to replace the catalytic converters. My pcm had been updated 100K miles earlier, with the cats being replaced at that time also.
I then took the 2003 Hybrid to a respected local shop, where they reset the codes and told me to drive for about 10 miles and return, to be sure of the codes being returned per Honda's instructions.
The light came back on at about 10 miles, and I did not return immediately, but drove home. The next day, the light was OFF.
Now, the light had come on, then it was off the next day. I took it in for inspection, and it passed with flying colors (a different result than you had stated). The light has still not come on, after 2000+ miles and counting.
Honda continues to rip off the American consumer with this issue, and I hope the proper authorities make Honda compensate everyone who has had to deal with this! Compensation for new catalytic converters, and compensation for our time which has been wasted due to Honda's generation of erroneous diagnostic codes which has cost the driving public thousands, if not millions of dollars, in wasted time and unnecessary repairs.