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Home >> Lexus >> 2007 >> GS 350 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 9 (Engine Control System (3UZ-FE)) >> 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) >> Monitor Strategy
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Monitor Strategy

WARNING: This page is about a different car, the 2007 Lexus GS 430. However, it is still accessible from the selected car via links, so may be relevant.
MONITOR STRATEGY CHART

Related DTCs P0171: Fuel trim Lean (bank 1)
P0172: Fuel trim Rich (bank 1)
P0174: Fuel trim Lean (bank 2)
P0175: Fuel trim Rich (bank 2)
Required Sensors/Components (Main) Fuel system
Required Sensors/Components (Related) Heated oxygen sensor (sensor 1), Engine coolant temperature sensor, MAF sensor, Crankshaft position sensor
Frequency of Operation Continuous
Duration Within 10 seconds
MIL Operation 2 driving cycles
Sequence of Operation None
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