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Code P0430

Discussion in '2nd Gen. Tacomas' started by 4x4jeep, Dec 24, 2011.

  1. 4x4jeep

    4x4jeep [OP] Well-Known Member

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    Is that the code for a bad gas cap?
     
  2. Cajun1

    Cajun1 Well-Known Member

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    google it!
     
  3. Cajun1

    Cajun1 Well-Known Member

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    P0430 OBD-II Trouble Code

    Technical Description

    Catalyst System Efficiency Below Threshold (Bank 2)
    What does that mean?

    Basically this means that the oxygen sensor downstream of the catalytic converter on bank 2 is detecting that the converter is not working as efficiently as it should be (according to specs). It is part of the vehicle emissions system.
    Symptoms

    You will likely not notice any drivability problems, although there may be symptoms such as a rough/hard idle when cold.
    Causes

    A code P0430 may mean that one or more of the following has happened:

    • The catalytic converter is no longer functioning properly
    • An oxygen sensor is not reading (functioning) properly
    • There is an exhaust leak
    Possible Solutions

    First, inspect for exhaust leaks.
    Next step is to measure the voltage at the oxygen sensor on Bank 2. In fact, it would be a good idea to test each oxygen O2 sensor while you're at it.
    One thing to note is that many vehicle manufacturers offer a longer warranty on emissions-related parts. So if you have a newer car but it's out of it's bumper-to-bumper warranty, there still may be warranty on this type of problem. Many manufacturers give a five year, unlimited mileage warranty on these items. It's worth checking into.
     
  4. 4x4jeep

    4x4jeep [OP] Well-Known Member

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    Its an 06 and second owner so no warranty. Haven't found or heard any exhaust leaks. Guess I will start with 02 censors . Thanks for the input
     
  5. 4x4jeep

    4x4jeep [OP] Well-Known Member

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    and the truck only has 65K miles the catalytic converter should still be good correct?
     
  6. Cajun1

    Cajun1 Well-Known Member

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    more than likely yes

    but i can assure that any OBD code you get is not a Bad gas cap..
     
  7. 4x4jeep

    4x4jeep [OP] Well-Known Member

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    Hooked up my scanner cleared the codes and the light stayed off. Both oxygen sensors are show 0.00V?
     
  8. 4x4jeep

    4x4jeep [OP] Well-Known Member

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    Happened to my moms trailblazer. The light would keep coming on until we replaced the gas cap. Some evap threshold below level or something like that
     
  9. Taco John

    Taco John Well-Known Member

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    You might want to check, but I think certain emissions systems (like cats) are covered for 8yrs/ 80k miles regardless of whether you are the first owner or not.
     
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