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Home >> Lexus >> 2013 >> IS 250 Base, AWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System (Diagnostic Codes (P0010-P0171)) >> 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

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) Air fuel ratio sensor, Mass air flow meter, Crankshaft position sensor
Frequency of Operation Continuous
Duration Within 10 seconds
MIL Operation 2 driving cycles
Sequence of Operation None