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  1. P0420 for 2008 Town and Country with 3.8L OHV Engine

    5th. Generation Chrysler Minivans: 2008-2019
    Hi, I am new to the forum. I have a 2008 Chrysler Town and Country Touring with 3.8L OHV Engine and 113k miles. I should prefix this post by saying that this van/engine has been always burning oil at a rate of about 1qt. per 3k miles at 20k miles and a rate of 1qt. per 1k miles now (113k)...
  2. Another P0420 Thread..

    4th. Generation Chrysler Minivans: 2001-2007
    {Warning: this will be a long-reading post as I want to detail as much as I can for context.} Vehicle: 2006 Grand Caravan SXT, 3.8L, ~122K miles, Stow'N'Go. Van threw the lovely P0420 code yesterday. Did research for testing for confirmation of a bad catalytic converter and was ready for my...
  3. P0420 changed valve seals and boiled the Catlytic Converter in acid. Now ETC code

    5th. Generation Chrysler Minivans: 2008-2019
    so i got the P0420 code - "Catalyst System Efficiency Below Threshold".. spent a morning at the dealer only to find out "not covered by lifetime extended warranty" (going to be $600+). and this 3.8L has always burned oil. After changing the valve seals (big job) and the PCV (very tough to...
  4. 02 sensor is it worth paying the cash to try

    4th. Generation Chrysler Minivans: 2001-2007
    thanks for reading this. 06, 3.8. hit the pedal to get speed up yesterday. 5 mins later get code light on. reads p0420. 88,000 miles on van. is it worth me buying 02 sensor (bosch, ntk options at advance a) for the front/upstream i believe represents upstream. i don't have a visual meter to...
  5. Any Help with MIL codes?

    5th. Generation Chrysler Minivans: 2008-2019
    First time poster to any type of forum, so forgive me if I'm doing this all wrong. 2009 T&C touring with the 3.8 and 6 speed trans. Throwing a P0420, P1128 and P0339 code. I can clear them with a scanner, and sometimes they'll clear themselves overnight...but all three come back after the...
  6. P0420 Code Returns after new Converter and new O2 sensors

    4th. Generation Chrysler Minivans: 2001-2007
    I need some help. Four months ago, I changed the Catalytic Converter and both O2 sensors with Chrysler parts. Everything was good for three months, now the P0420 is back. Any ideas? The 2006 has 152K miles and is on the second CC. I have one of those 3.8's that burns lots of oil and the CC...
  7. New Catalytic Converter and still getting P0420 ? Please Help

    4th. Generation Chrysler Minivans: 2001-2007
    I have a 2006 T&C with 3.8L - Here is the history on this - I have been battling the P0420 code for a while - so I ended up replacing all the following within the last 6 months - only to have the P0420 code keep coming back. I have replaced the following: upstream & downstream O2 sensors, MAP...
  8. 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...