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Home >> Lexus >> 2010 >> SC 430 >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System (Diagnostic Codes (P0010-P0340) >> SFI System >> DTC P0171: System Too Lean (Bank 1); DTC P0172: System Too Rich (Bank 1); DTC P0174: System Too Lean (Bank 2); DTC P0175: System Too Rich (Bank 2) >> Typical Enabling Conditions
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Typical Enabling Conditions

Monitor will run whenever these DTCs are not present P0010, P0020 (VVT Oil Control Valve)
P0011, P0021 (VVT System - Advance)
P0012, P0022 (VVT System - Retard)
P0016, P0018 (VVT System - Misalignment)
P0031, P0032, P0051, P0052 (Front Oxygen Sensor Heater)
P0134, P0154 (Front Oxygen Sensor)
P0102, P0103 (Mass Air Flow Sensor)
P0115, P0117, P0118 (Engine Coolant Temperature Sensor)
P0125 (Insufficient Coolant Temperature for Closed Loop Fuel Control)
P0120, P0121, P0122, P0123, P0220, P0222, P0223, P2135 (Throttle Position Sensor)
P0335 (Crankshaft Position Sensor)
P0340, P1340 (Camshaft Position Sensor)
P0340, P0345 (VVT Sensor)
P0351 - P0358 (Igniter)
P0500 (Vehicle Speed Sensor)
Battery voltage 11 V or more
Fuel system status Closed loop
Either of following conditions (a) or (b) is met -
(a) Engine RPM Less than 1000 rpm
(b) Intake air amount per revolution 0.28 g/rev. or more
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