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p0141

  1. 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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