Anyone have a driver side cat to sell? Code P0420 thrown.........
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2004-2007 Cadillac CTS-V General Discussion Discussion, Anyone have a driver side cat to sell? Code P0420 thrown......... in Cadillac CTS-V Series Forum - 2004 - 2007; I have a P0420 code thrown. I am still on stock manifolds and cats. I am itching to do LTs ...
  1. #1
    PJGross is offline Cadillac Owners Fanatic
    Automobile(s): 2005 CTS-V
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    Anyone have a driver side cat to sell? Code P0420 thrown.........

    I have a P0420 code thrown.
    I am still on stock manifolds and cats. I am itching to do LTs and a re-tune, but right now do not have the free cash flow to get that done.

    I was going to swap the pre-cat O2 sensors to make sure the code doesn't swap with the sensors to P0430, but if that comes back with the same, then I'll be looking for a temporary cat to use for the next 10-20k miles.

    Running a very rich maggie tune for 80k miles probably didn't help. Car has 102k miles total.

    I'm guessing b/c I'm getting this efficiency code the previous owner/tuner kept the rear O2s operational? Makes sense otherwise the computer wouldn't be checking "efficiency".

    Anything else easy besides sensor or bank 1 cat to look for? No obvious changes have occurred like leaks, etc.

    Thanks,
    PJ

    PS- what does a driver side cat go for new? (this could be used in an argument towards going with LTs and hi-flow cats, for example)

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  3. #2
    HAMSTAR is offline Cadillac Owners Enthusiast
    Automobile(s): 2006 CTS-V
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    Re: Anyone have a driver side cat to sell? Code P0420 thrown.........

    Yup, where are you located?

  4. #3
    darkman's Avatar
    darkman is offline Cadillac Owners Master
    Automobile(s): 2005 CTS-V
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    Re: Anyone have a driver side cat to sell? Code P0420 thrown.........

    Driver's side cat is part number 10358089 with an MRSP of $542.50. The online supplier I looked at wanted $498.33 delivered. Also to consider - the circumstances that affected this cat probably affected the other cat.

  5. #4
    NCOGNITO's Avatar
    NCOGNITO is offline Cadillac Owners Fanatic
    Automobile(s): 2004 CTS-V - Black Raven
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    I have a set off my 04, pulled at 30K that I would sell - PM if interested.

  6. #5
    4DoorGTZ's Avatar
    4DoorGTZ is offline Cadillac Owners Fanatic
    Automobile(s): Maggie'd 05 CTS-V
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    Re: Anyone have a driver side cat to sell? Code P0420 thrown.........

    Also have a set for sale, pulled off at 20k km, but shipping would be from Canada if you wanted to factor that into your decision.

  7. #6
    sssnake's Avatar
    sssnake is offline Cadillac Owners Fanatic
    Automobile(s): CTS-V
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    Dec 2008
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    I have a pair with 65k miles on them. PM if interested.

  8. #7
    Destram's Avatar
    Destram is offline Cadillac Owners Member
    Automobile(s): 2004 CTS-V
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    Re: Anyone have a driver side cat to sell? Code P0420 thrown.........

    PM'd you, sssnake.

  9. #8
    PJGross is offline Cadillac Owners Fanatic
    Automobile(s): 2005 CTS-V
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    Re: Anyone have a driver side cat to sell? Code P0420 thrown.........

    Thanks for the replies! Darkman, appreciate the OE replacement info. I didn't have to bug Luke with that.

    I will PM repliers, I appreciate the responses.

    I guess my WTP (willingness to pay) is based on my NBA (Next Best Alternative) which in this case is one of the following:
    1. Find someone local w/ an open HPTuners spot to disable the rear O2s.
    2. Get a proper dyno tune that will include #1
    3. Install headers/offroad pipes + 1 & 2 above
    4. By new OE cat

    Anyway, not sure what cats go for used but I'll PM you guys in order and find out.....except for sssnake b/c I'm not going to get into a bidding war.

    I forgot my location isn't in my posting: Lake Orion, MI, just north of Detroit.

    Thanks again,
    PJ Gross

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