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  1. 1st Gen - Problems and Fixes
    Hi, I'll try to be detailed enough for some good ideas here. 2 months ago I got an 04 TSX from a buddy with 238k miles. When I got it: 1. He told his mechanic said it's okay to use 87 octane fuel. He's been doing this for 2 years approximately. For the last 2 fill ups, I switched back to 93...
  2. 1st Gen - Problems and Fixes
    Hi everyone, I had been strugling with my CEL for a while. I have P0420 code. I went to indy shop, they did diagnose upon doing proper checks on both sensors, and concluded that it is, as I suspected, bad cat. Now, with decent amount of certainty, I can say that cat is the problem and needs to...
  3. 1st Gen - Problems and Fixes
    I have a completely aftermarket exhaust system (see below) and I have been throwing the CEL code P0420 (Catalyst System Efficiency Below Threshold {Bank 1}). I bought an OBDII reader to clear this code (usually took a week or two to reappear) and after a while I got lazy and just left it on. I...
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