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Home › Mazda › 2003 › Protege5 Automatic › Repair and Diagnosis › Engine Performance › System › Engine Controls - Self-Diagnostics › Diagnostic Tests › DTC P0101: Mass Airflow Sensor Circuit Range/Performance Problem › Possible Causes

Possible Causes

Electrical corrosion in MAF signal or return circuits.
MAF sensor malfunction.
Throttle Position (TP) sensor malfunction.
Voltage drops in ground or MAF signal circuits.