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Home >> Toyota >> 2019 >> Sienna SE, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 16 (Engine Control System [2GR-FE] - Diagnostic Codes (1 Of 3)) >> 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) [12/2015 - 08/2016] >> Monitor Strategy

Monitor Strategy

WARNING: This page is about a different car, the 2016 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.
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 Less than 10 seconds
MIL Operation 2 driving cycles
Sequence of Operation None
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