LEMON Manuals
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4Runner TRD Pro
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Repair and Diagnosis
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Engine Performance
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System
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Engine Control System - Diagnostic Codes (P0010-P0128)
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SFI System
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DTC P0101: Mass Air Flow Circuit Range / Performance Problem [08/2015 - ]
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Typical Malfunction Thresholds
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Typical Malfunction Thresholds
Both of the following conditions are met
1 and 2
1. Average engine load value ratio
Less than 0.85, or more than 1.16 (varies with estimated engine load)
2. Average air-fuel ratio
Less than -20%, or more than 20%