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Home >> Toyota >> 1999 >> RAV4 Base, 2D Utility, AWD, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self-Diagnostics >> Diagnostic Tests >> DTC P0171 Or P0172: System Too Lean/Rich (Except CALIF. Emissions) >> Notes
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DTC P0171 Or P0172: System Too Lean/Rich (Except CALIF. Emissions): Notes

NOTE: Heated oxygen sensor No. 1 refers to oxygen sensor closest to engine block. Heated oxygen sensor No. 2 refers to oxygen sensor farthest from engine block.
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