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check ing.light;code P0442

Discussion in '1st Gen. Tacomas (1995-2004)' started by AMOCAT04, Jun 28, 2025.

  1. Jun 28, 2025 at 11:34 PM
    #1
    AMOCAT04

    AMOCAT04 [OP] New Member

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    hi guys I have a 04Taco 3.4L v6 with 200,000ml{aprox} prerunner 2wd.
    the check Ingine light came up, with code: P0442, I bought an after market gas cap from, auto zone, cleared the code, and tested it out, but the code came back after couple days, any one else with the same issue that share some light?
     
  2. Jun 29, 2025 at 6:39 AM
    #2
    t0p_d0g

    t0p_d0g 私はタコマが大好きです

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    It could be a faulty EVAP system. Do you smell gas around or near the gas tank?
     
  3. Jun 29, 2025 at 6:52 AM
    #3
    Glamisman

    Glamisman Well-Known Member

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  4. Jun 30, 2025 at 3:19 PM
    #4
    AMOCAT04

    AMOCAT04 [OP] New Member

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    Little, but I did, so I changed my gas cap, and cleared the code and im gonna sit and wait, if it comes back,if the leak comes back I am gonna have to do a more specific check on the evap system, to check for posible hose leak, or malfunctioning sensor
     
  5. Jun 30, 2025 at 7:50 PM
    #5
    Glamisman

    Glamisman Well-Known Member

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    If I am giving you redundant information, accept my apologies in advance. The evaporative monitor is a 2 trip monitor and only runs when a certain set of conditions have been met. The engine needs to be cold and has to have sat for 8 hours, the engine coolant temperature needs to be within 10 degrees of outside air temp, the fuel tank needs to be between 1/4 and 3/4 full and this has to happen 2 times in a row. If you interrrupt this proceedure you get to start over.
     
    wilcam47 likes this.
  6. Jun 30, 2025 at 7:54 PM
    #6
    Logans2001

    Logans2001 What’s crackin’

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