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p0420
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  1. S10 / S15
    I have a 2003 s10 6cyl 4x4. I had this 10 dollar generic code that on research looked like it could be the cat. I actually replaced the cat and even a gas cap. The code went away for about a month. Then came back on aftera a month or so, then went away again and stayed gone for about 2 months...
  2. 262ci Forum (4.3)
    Hello, community: I've been chasing a misfire on cylinder 3 for a while now. And then this happens; I'll run it back to a month ago or so, the persistent P0303 (Cyl 3 Misfire) code disappeared on its own, yet a new P0420 code appeared. That's the cat. That's an "easy" fix. I just brought it to...
  3. 2.2L - 2nd gen 4-banging
    2000 2.2 s10, 270k miles So Ive been trying for along time fixing a p0171 code, (rough idle, rarely dies at a stop, slow accelleration and towards the end staryed bogging down on hills) replacing parts, new intake gasket, cleaning TB etc, till finally a coworker hooked up his fancy snapon code...
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