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  1. Problems, Maintenance, and Repair (Gen 2)
    Hi, I have been getting this CEL P0430. I have deleted it using the OBD2 tool. Any suggestions from folks who have had this CEL. 06 Sienna LE, 158k miles. My first step: I am going to fill up with 93 octane gas along with a dose of Techron or Lucas system cleaner tomorrow as some one had done...
  2. Problems, Maintenance, and Repair (Gen 2)
    So, I've note got P0430 in my 08 California Sienna. Bank2 cat operating below threshold. I've replaced all 6 of the plugs and all 4 of the AF - O2 sensors. The plus were burning well, that nice light golden brown. The sensors all looked good to. I didnt see any oil on the plugs and they weren't...
  3. Problems, Maintenance, and Repair (Gen 2)
    I got the code and was mentally preparing for a the catalytic converter replacement but I thought it would be worth it to try and change a few things out first. At first I was going to replace the oxygen sensors but they were also pricey so with a little more youtube googling I found a video...
  4. Anything Sienna
    I have a P0430 code Bank 2 and I want to be sure that it is the converter or the O2 sensor. Any suggestions?
  5. Problems & Issues
    Multiple times in the past I've tried to jump in and offer some insight into how to handle P0420 / P0430 Catalytic Efficiency codes, both on this board and on a few others. There is a lot of confusion and misinformation out there. I thought I'd consolidate my understanding in one place, and...
  6. Problems & Issues
    Hi, I'm new here but our van has been serving us well for years, logging right at 110K and killing us with tire wear but no major issues. We drove on two long interstate trips this summer (1100 miles round trip each) at higher than normal driving speeds. Got expected gas mileage on each. The...
  7. Problems, Maintenance, and Repair (Gen 2)
    Hi, I'm new here but our van has been serving us well for years, logging over 140K mostly trouble free miles. For the past few months though the ECM has been throwing codes for reduced cat efficiency. I'd reset it and the CEL comes back on after a few hundred miles. Looking around the web, I see...
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