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Home >> Toyota >> 2005 >> Matrix Base, FWD, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Control System (SFI) (1ZZ-FE(4WD)) - Diagnostics) >> SFI System (1ZZ-FE (4WD)) >> DTC P0171, P0172: System Too Lean/Rich (Bank 1) >> Typical Enabling Conditions
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Typical Enabling Conditions

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Fuel-trim: 

TYPICAL ENABLING CONDITIONS CHART

Monitor runs whenever following DTCs not present See LIST OF DISABLE A MONITOR 
Fuel system status Closed-loop for more than 13 seconds
Battery voltage 11 V or more
Throttle position learning Completed
Either of following conditions A or B set -
A. Engine RPM Below 1,100 rpm
B. Intake air amount per revolution 0.14 g/rev or more