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Home >> Toyota >> 2011 >> Avalon Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Engine Control System SFI System (Diagnostic Codes (P0136 - P0441)) >> SFI System >> DTC P0171: System Too Lean (Bank 1) (FROM 12/2010); DTC P0172: System Too Rich (Bank 1) (FROM 12/2010); DTC P0174: System Too Lean (Bank 2) (FROM 12/2010); DTC P0175: System Too Rich (Bank 2) (FROM 12/2010) >> 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) A/F sensor, Mass air flow meter, Crankshaft position sensor
Frequency of Operation Continuous
Duration Less than 10 seconds
MIL Operation 2 driving cycles
Sequence of Operation None
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