Car Problem Reports

Toyota 4Runner Hesitation or Misfire Due to Failed Mass Air Flow Sensor

Toyota 4Runner Problem
6 Reports
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Model Years Affected: 1998, 1999, 2000, 2001, 2002


When a mass air flow sensor problem occurs, resulting in a loss of power or hesitation on acceleration, the Check Engine Light will illuminate, perhaps indicating random cylinder misfire. The mass air flow sensor may respond to cleaning, but replacement of the sensor is best.

  • Visitor, , 134,000 mi

    This has happened 5 times since I purchased this auto in 2001. It happened 3 times in 3 years.
    The problem is happening again. The check light came on just two days ago, it has been two years since
    event. This flow sensor has cost me over $500.00 so far. It has been cleaned, replaced. Why does it go out
    so often?


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