Code P0420 Permanent

Discussion in 'GEN 1' started by Alski, Jul 7, 2017.

  1. Alski

    Alski New Member

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    Hi All,
    So my 2013 Raptor (6.2L) CEL came on and after checking and attempting to clear the code I wind up with this P0420 (Catalyst System Efficiency Below Threshold Bank 1) and it lists as Permanent and will not clear. I even tried disconnecting the battery. Anyone know how I can clear it (or can I)?
    I am thinking that this is an indicator of a lazy cat and may need to replace it? and bank 1 would be the passenger side?
     
  2. Big Bill

    Big Bill Active Member Moderator Site Supporter Level 5

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    Sounds like it could be a few different things going on. Check out this thread it give you a few thing to look at. Maybe you will get lucky and have it turn out to be a O2 censor in the cat. Let us know how you make out.

    P0420 FORD Catalyst System Efficiency Below Threshold Bank 1

    Good luck with it.
     
  3. Alski

    Alski New Member

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    Well finally had a chance to trouble shoot (as detailed above). My reader wouldn't consistently read voltage of the O2's but could check temperatures coming in and out of the cats, and sure enough the exit temp was about 100 deg. less going out than the entering temp. Also checked the other side to verify what it should be and the other side kept at least a constant temperature coming in and going out. Placed an order for an new cat (ouch).
     
  4. guardrail

    guardrail Member

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  5. Alski

    Alski New Member

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    Wow wish I knew that before ordering one and having it shipped (supposed to be delivered tomorrow).
    Mine has a cat back exhaust on it, reading this I don't think that would cancel the warranty, and don't think it is an issue if the truck is no longer under the original warranty (not the original owner)?
     
  6. guardrail

    guardrail Member

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    Shouldn't matter what owner you are.
    My wife's 06 Explorer had a cat go bad at 72k miles in 2013. She is the second owner.
    I took it to the dealer to have it checked, and they confirmed it was bad. They gave me a $1800 estimate and then I showed them the warranty. It's actually in the owners manual.
    The guy behind the counter said he never heard of it, took the owners manual made a phone call. He came back and said it was covered.
     

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