Mass Airflow Sensor

Faults in Mass Airflow (MAF) sensor or circuit should set a Diagnostic Trouble Code (DTC). See QUICK TEST in SELF-DIAGNOSTICS - B2300, B2500, B3000, B4000 & TRIBUTE article. If no DTC has been set, go to TEST DC under SYSTEM TESTS in SELF-DIAGNOSTICS - B2300, B2500, B3000, B4000 & TRIBUTE article for MAF sensor and circuit testing.