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Home >> Lexus >> 2009 >> ES 350 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control (SFI) System (Diagnostic (Codes P0010-P043E)) >> 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

FUEL TRIM:

The monitor will run whenever these DTCs are not present P0010, P0020 (OCV bank 1, 2)
P0011, P0021 (VVT system bank 1, 2 - advance)
P0012, P0022 (VVT system bank 1, 2 - retard)
P0013, P0023 (Exhaust OCV 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 (A/F sensor heater)
P0102, P0103 (MAF meter)
P0115, P0117, P0118 (ECT sensor)
P0120, P0121, P0122, P0123, P0220, P0222, P0223, P2135 (TP sensor)
P0125 (Insufficient ECT for closed loop)
P0335 (CKP 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)
P0500 (Vehicle speed sensor)
Fuel system status Closed-loop
Battery voltage 11 V or more
Either following condition is met Condition 1 or 2
1. Engine RPM Less than 1,100 rpm
2. Intake air amount per revolution 0.22 g/rev or more
Catalyst monitor Not executed
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