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Check Engine Light

Discussion in '1st Gen. Tacomas (1995-2004)' started by azhnter, Sep 19, 2015.

  1. Sep 19, 2015 at 1:02 PM
    #1
    azhnter

    azhnter [OP] Member

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    I have an 02 Dbl Cab with 78k miles on it. I recently took a trip to NM for a weekend and was running around on dirt roads. It was hot and dusty. That was about 3 weeks ago. A few days ago the check engine light came on. The truck is running fine except my MPG has taken a major hit to around 10mpg. I used to have a 99 4Runner that would experience the same thing after taking it on dusty roads when it was hot. Anybody else have this problem? Does it seem to be common in these engines? I plan on cleaning the MAF sensor as this is usually what causes the problem, but when it happened on my 4Runner it would also throw a code indicating the O2 sensor needed replaced. Any thoughts?
     
  2. Sep 19, 2015 at 1:31 PM
    #2
    devinzz1

    devinzz1 Well-Known Member

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    lewisporte Newfoundland
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    step 1: get code checked.
     
    Caligula likes this.
  3. Sep 19, 2015 at 1:42 PM
    #3
    Dalandser

    Dalandser ¡Me Gustan Las Tacos-mas!

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  4. Sep 19, 2015 at 1:59 PM
    #4
    azhnter

    azhnter [OP] Member

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    I'm not worried so much about the code as I am the frequency of this happening under similar circumstances on two different vehicles with the same engine, but I do plan on getting it checked.
     
  5. Sep 19, 2015 at 2:11 PM
    #5
    Holy schmidt

    Holy schmidt Well-Known Member

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    Never had a check engine light come on after dirt roads. Get the cel code as it might not have anything to do with that as it came on a few weeks after
     
  6. Sep 19, 2015 at 3:54 PM
    #6
    Dalandser

    Dalandser ¡Me Gustan Las Tacos-mas!

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    It could be a coincidence. My family used to go driving on logging roads up in Maine where we'd have to pull over each time a logging truck would drive by because we'd be blinded by a cloud of dust for a good five to ten seconds after they'd drive by. They'd leave the engine running while we waited for the dust to clear. We had a 4.0 Cherokee and a Suburban and never had a CEL right after or anything. I don't even think my parents would change the air filter after although it wouldn't have been a bad idea if they had. I'm not sure that dust has any way of affecting the engine other than through the air intake since engines are a closed system besides the intake and the exhaust.
     
  7. Sep 19, 2015 at 11:20 PM
    #7
    2004TacomaSR5

    2004TacomaSR5 Nemesis Prime

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    O2 sensor is my best guess. There are 2 of them on these I think. Easy to replace but would be best to have the code read before spending any money.
     
  8. Sep 19, 2015 at 11:27 PM
    #8
    Caligula

    Caligula Well-Known Member

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    Posting on Tacomaworld is step 4 or 5. Check what code it is.
     
  9. Sep 20, 2015 at 4:49 AM
    #9
    devinzz1

    devinzz1 Well-Known Member

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    There may be some talent on this site but nobody can tell him why his truck randomly developed a problem a month after driving on a dirt road...
     
  10. Sep 20, 2015 at 6:27 AM
    #10
    Caligula

    Caligula Well-Known Member

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    Ohh I have an idea, it's probably a misfire related code. It's just the point of asking a fruitless question.
     

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