Mike's Workshop Manuals
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Lexus
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2011
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GX 460
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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 (P0401-P1605))
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SFI System
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DTC P0401: Exhaust Gas Recirculation Flow Insufficient Detected
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Typical Malfunction Thresholds
Typical Malfunction Thresholds
Manifold pressure change
Less than 1.8125 kPa (14 mmHg)
Engine speed
1400 rpm