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Home › Lexus › 1998 › SC 400 › Repair and Diagnosis › Engine Performance › System › Engine Controls - Tests W/Codes › Diagnostic Tests › DTC P0171 Or P0172: Fuel Trim › Notes

DTC P0171 Or P0172: Fuel Trim: Notes

DTC P0171 = System Too Lean (Fuel Trim)
DTC P0172 = System Too Rich (Fuel Trim)