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Thread: 1997 chevy truck code p0430 help

  1. #1
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    1997 chevy truck code p0430 help

    OK guys,

    After fixing my engine problem, now I have a new code-P0430- the clogged cats code. I have replaced all 3 O2 sensors with Bosch premiums and the truck loses power above 3000 rpm, so I'm guessing the cats(2) are clogged. Can I somehow clean them? Anyone have any luck doing that? I have seen some stuff that claims to clean them but I'm skeptical. Please advise.

  2. #2
    Senior Moderator chevychase's Avatar
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    Sure must be some mean stuff. You are going to change probably anyways ..dropem see how truck runs .
    Just a thought ..

    Gitter done have fun. Running on empty...running blind...running behind.....

  3. #3
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    I think I drove too long with the bad CTS sensor, and the truck was always in warm-up mode, thus the clogged cats. I'm hoping there's a simple and good way to clean them, if anyone has suggestions I'm all ears.

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    Senior Moderator chevychase's Avatar
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    If it is the cats.. notta what would you pour in tank that would clean them ...but not mess all other components up.
    Besides it would burn up /dissipated before it got to the cat.. what do you think?

    Gitter done have fun. Running on empty...running blind...running behind.....

  5. #5
    Senior Moderator chevychase's Avatar
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    Tell you how to check the cats... before cats will be a whole lot hotter.. than after.
    After truck cools ..crank ..put hand before.. and one after ..should get same temp.
    Not too long gets hot quick.
    Or if you had a temp gun... I have seen a clogged cat get cherry red ..seen grass catch fire under it. ..wild.

    Gitter done have fun. Running on empty...running blind...running behind.....

  6. #6
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    Will try tomorrow chase-thanks a million. Will report back my findings and lean on you some more. Chase you must have a **** of a time carrying all that knowledge around with you

  7. #7
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    I tried the hand trick and there is very little difference in temp from before and after the cats. I cleared the code and drove if for a couple days with no issues, and going down the road today the ses light came back on with the same code. I think I am going to check voltage at bank 2 O2 sensor-
    Chase can you explain how to do this in simple terms? I have a good meter-just need some easy to understand instructions how to check. I never got this code until after replacing the oxygen sensors, so I'm thinking maybe the new sensor isn't reading right?

  8. #8
    Senior Moderator chevychase's Avatar
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    02,s working right. But to check have to have a scanner to read live data.
    You would ..get a code for 02,s if any problem.
    When you scan if... 02,s reading should change alot and quick.
    I wouls say ... cts dumping fuel in mess cat up.
    Will think some more ... but rear 02 is working reading cat is below threshold .

    Tell by my lazy typeing .. i,am slap dab tired .. done 2 metal roofs .. I know who cares lol

    Gitter done have fun. Running on empty...running blind...running behind.....

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