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

Submitted by Vehicle Owner · Jul 20, 2025

Published by RepairPal

Problem overview

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.

32 people reported this problem

9 comments

Schedule Repair

Toyota 4Runner vehicles with this problem

8 model years affected

Average mileage: 206,045 miles

(121,000 - 296,000)

Repairs related to this problem

Mass Airflow Sensor Replacement

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