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Home >> Lexus >> 2008 >> SC 430 >> Repair and Diagnosis >> External Pages >> Different car >> Section 17 (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

WARNING: This page is about a different car, the 2007 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.
TYPICAL ENABLING CONDITIONS

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 1,000 rpm
(b) Intake air amount per revolution 0.28 g/rev. or more
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