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Prius Plug-in
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Repair and Diagnosis (Single Page)
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Engine Control System (Plug-In) (Diagnostic Codes (P0010-P0454))
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DTC P0101: Mass Air Flow Circuit Range / Performance Problem
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Typical Malfunction Thresholds
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Typical Malfunction Thresholds
Both of the following conditions are met
-
Average engine load value ratio
Less than 0.1, or higher than 3.5 (varies with estimated engine load)
Average air fuel ratio
Less than -20%, or higher than 20%