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p0420

  1. 2007 Pilot Misfiring, Cranks But Won't Start, CEL VTM-4 Light P0300-0306, P0420

    2003-2008 Pilot
    Searched all over this forum and others but haven't found anyone with same combination of issues. 2007 Honda Pilot EX-L 4WD with about 145k miles has had P0420 code for a while maybe a year now intermittently. Only seemed to come on right after refueling every few fill-ups, so I replaced gas cap...
  2. Intermittent P0420 & P0430 codes - 2013 Pilot EX-L

    2012-2015 Pilot
    My wife's 2013 Pilot, 115k miles, has been giving me a Check Engine Light (CEL) the last few months and the reader started out with just a P0420 code but then added P0430. The CEL will go away on it's own for no apparent reason, the Econ mode will work and then with no indication of performance...
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