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code p0420

  1. 2012 T&C. p0420 code

    5th. Generation Chrysler Minivans: 2008-2019
    I am having a few issues with my 2012 T&C. 145K miles. it is having a hard time acceleration around 1200-1500RPM, if i am light on the gas it makes a weird sound and is slugish. Recently have been noticing decreased MPG (14 or less range for mostly in town driving, 22ish for long trips)...
  2. Done everything P0420 still wont go away - please help

    4th. Generation Chrysler Minivans: 2001-2007
    Hello everyone - I got a P0420 ( Catalyst System Efficiency Below Threshold Bank 1 ) a while back - so i replaced the front and rear o2 sensors and did a good tune up on the van - with new EGR valve spark plugs pcv the works. Code stayed off for maybe a month - then back on - finally after...
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