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Home >> Toyota >> 2007 >> Matrix Base, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Engine Control System (1ZZ-FE) >> SFI System >> DTC P0171 System Too Lean (Bank 1); DTC P0172 System Too Rich (Bank 1) >> Monitor Strategy
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Monitor Strategy

MONITOR STRATEGY

Related DTCs P0171: Fuel trim Lean
P0172: Fuel trim Rich
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