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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 Enabling Conditions
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Typical Enabling Conditions

P0400, P0402

Monitor runs whenever the following DTCs are not stored None
Time after engine started 3 seconds or more
Time after engine fuel cut 2.6 seconds or more
Engine speed 950 to 1600 rpm
Vehicle speed 20 km/h (12.5 mph) or more
Engine coolant temperature 75°C (167°F) or higher
Battery voltage 11 V or higher
Intake air temperature -10°C (14°F) or higher
Atmospheric pressure 76 kPa(abs) (11 psi(abs)) or higher
P0401

Monitor runs whenever the following DTCs are not stored P0010, P0020 (VVT oil control solenoid bank 1, 2)
P0011, P0021 (VVT system bank 1, 2 - advance)
P0012, P0022 (VVT system bank 1, 2 - retard)
P0013, P0023 (Exhaust VVT oil control solenoid bank 1, 2)
P0014, P0024 (Exhaust VVT system bank 1, 2 - advance)
P0015, P0025 (Exhaust VVT system bank 1, 2 - retard)
P0016, P0018 (VVT system bank 1, 2 - misalignment)
P0017, P0019 (Exhaust VVT system bank 1, 2 - misalignment)
P0031, P0032, P0051, P0052, P101D, P103D (Air fuel ratio sensor heater)
P0102, P0103 (Mass air flow meter)
P0106, P0107, P0108 (Manifold absolute pressure)
P0112, P0113 (Intake air temperature sensor)
P0115, P0117, P0118 (Engine coolant temperature sensor)
P0120, P0121, P0122, P0123, P0220, P0222, P0223, P2135 (Throttle position sensor)
P0125 (Insufficient engine coolant temperature for closed loop fuel control)
P014C, P014D, P014E, P014F, P015A, P015B, P015C, P015D, P2195, P2196, P2197, P2198, P2237, P2238, P2239, P2240, P2241, P2242, P2252, P2253, P2255, P2256 (Air fuel ratio sensor)
P0171, P0172, P0174, P0175 (Fuel system)
P0327, P0328, P0332, P0333 (Knock control sensor)
P0335 (Crankshaft position sensor)
P0340, P0342, P0343, P0345, P0347, P0348 (VVT sensor)
P0351, P0352, P0353, P0354, P0355, P0356 (Igniter)
P0365, P0367, P0368, P0390, P0392, P0393 (Exhaust VVT sensor)
P106A (Evaporative emission control system pressure sensor - manifold pressure sensor correlation)
P11EA, P11EB, P11EC, P11ED, P11EE, P11EF, P11F0, P11F1, P219A, P219B, P219C, P219D, P219E, P219F, P21A0, P21A1 (Air-fuel ratio imbalance)
Time after engine started 3 seconds or more
Time after engine fuel cut 2.6 seconds or more
Engine speed 950 to 1600 rpm
Vehicle speed 20 km/h (12.5 mph) or more
Engine coolant temperature 75°C (167°F) or higher
Battery voltage 11 V or higher
Intake air temperature -10°C (14°F) or higher
Atmospheric pressure 76 kPa(abs) (11 psi(abs)) or higher