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Home >> Toyota >> 2013 >> Prius Plug-in >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostic Codes ( P0010 - P0300)) (Plug-In) >> SFI System >> DTC P0101: Mass Air Flow Circuit Range / Performance Problem >> Typical Malfunction Thresholds
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Typical Malfunction Thresholds

Both of the following conditions are met -
Average engine load value ratio Less than 0.83, or higher than 1.15 (varies with estimated engine load)
Average air fuel ratio Less than -20%, or higher than 20%