Possible Causes

WARNING: This page is about a different car, the 2002 Mazda B4000, 2002 Mazda B3000, and 2002 Mazda B2300. However, it is still accessible from the selected car via links, so may be relevant.

Mass Airflow (MAF) sensor measures amount of engine incoming air. Sensor outputs an analog voltage signal to PCM. PCM uses signal to calculate required fuel injector pulse width. Input is also used to determine transmission electronic pressure control, shift and torque converter clutch control. Possible causes are:

Damaged MAF sensor (P0102, P0103 or P1101).
Blocked MAF sensor screen (P0103).
MAF sensor disconnected (P0102).
Contaminated MAF sensor (P1101).
MAF sensor partially connected (P1101).
Open PWR GND circuit (P0102 or P1101).
Open MAF RTN circuit (P0102 or P1101).
Open VPWR circuit (P0102).
MAF SIG circuit shorted to VPWR (P0103).
MAF SIG circuit shorted to ground (P0102).
MAF SIG circuit open (P0102).
Sensor connector or harness with poor continuity (P1100).
Sensor with internal intermittent open or short (P1100).
Damaged PCM (P0102, P0103 or P1101).
Intake air leak near MAF sensor (P0102).
TP sensor system, possible closed throttle indication (P0102).