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Not passing smog check

Discussion in '4th Gen 4Runners (2003-2009)' started by Adriancortez1, Apr 26, 2021.

  1. Apr 26, 2021 at 9:50 AM
    #1
    Adriancortez1

    Adriancortez1 [OP] New Member

    Joined:
    Apr 26, 2021
    Member:
    #21142
    Messages:
    1
    Gender:
    Male
    I have a 2003 4Runner won’t pass smog
    Problem is my check engine light and maintenance light don’t light up when starting my car how can I fix this ?
     
  2. Apr 29, 2021 at 9:41 AM
    #2
    iamincrediboy

    iamincrediboy New Member

    Joined:
    Dec 16, 2020
    Member:
    #18551
    Messages:
    527
    Gender:
    Male
    South FL
    Vehicle:
    2005 V8 4Runner Limited - Silver
    Have you run a trouble code check with an OBDII reader? That'll be the very first place to start. Without any other input your runner could not be initiating self checks (what it does when the lights light up then turn off during the ignition sequence) which could be anything from bad ECU to a single wire short. Give us all more info and we can help, and take it to a trusted mechanic you know of. Even when they come out with a diagnosis, make them explain it and show you whats wrong to figure out the issue.
     
    2Toys and Bob like this.

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