LEMON Manuals
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Prius Three
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Repair and Diagnosis (Single Page)
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Engine Performance
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Engine Control System (Diagnostic Codes (P0010 - P0171)) (Except Plug-In)
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SFI System
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DTC P0101: Mass Air Flow Circuit Range / Performance Problem [10/2013 - ]
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Typical Malfunction Thresholds
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Typical Malfunction Thresholds
Both of the following conditions 1 and 2 are met
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1. Averaged engine load value ratio
Less than 0.85, or more than 1.15 (varies with estimated engine load)
2. Averaged air fuel ratio
Less than -20%, or more than 20%