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Home >> Lexus >> 2021 >> RX 450h Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostic Codes) (4 Of 8) >> SFI System >> DTC P0400: Exhaust Gas Recirculation Flow; DTC P0401: Exhaust Gas Recirculation Flow Insufficient Detected; DTC P0402: Exhaust Gas Recirculation Flow Excessive Detected [07/2020 - ] >> Typical Malfunction Thresholds
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Typical Malfunction Thresholds

P0400

Manifold pressure change* Less than 1.75 kPa (0.25 psi) (at engine speed 1000 rpm)
P0401

Manifold pressure change* Less than 1.75 kPa (0.25 psi) (at engine speed 1000 rpm)
Manifold pressure Less than 57.05 kPa (8.27 psi)
P0402

Manifold pressure change* Less than 1.75 kPa (0.25 psi) (at engine speed 1000 rpm)
Manifold pressure 57.05 kPa (8.27 psi) or more
*: Calculated by EGR valve open and close -