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Home >> Lexus >> 2008 >> SC 430 >> Repair and Diagnosis >> Engine Performance >> Engine Control System >> 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

Typical Enabling Conditions

TYPICAL ENABLING CONDITIONS CHART

Monitor will run whenever these DTCs are not present P0010, P0020 (VVT VSV 1, 2)
P0011 (VVT system 1 - advance)
P0012 (VVT system 1 - retard)
P0021 (VVT system 2 - advance)
P0022 (VVT system 2 - retard)
P0031, P0032, P0051, P0052 (heated oxygen sensor 1)
P0100 - P0103 (MAF meter)
P0115 - P0118 (ECT sensor)
P0120 - P0223, P2135 (TP sensor)
P0125 (insufficient ECT for closed loop)
P0130, P0153 (heated oxygen sensor 1)
P0335 (crankshaft position sensor)
P0351 - P0358 (Igniter)
P0500 (VSS)
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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