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Home >> Toyota >> 2024 >> Corolla LE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 38 (Engine Control System (2ZR-FXE) - Diagnostic Codes (06 Of 15)) >> SFI System >> DTC P0171-00: System Too Lean Bank 1; DTC P0172-00: System Too Rich Bank 1 [04/2020 - 09/2022] >> Monitor Strategy

Monitor Strategy

WARNING: This page is about a different variant/trim than selected.
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 sub-assembly
Crankshaft position sensor
Frequency of Operation Continuous
Duration Within 10 seconds
MIL Operation 2 driving cycles
Sequence of Operation None