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Home › Lexus › 1994 › ES 300 › Repair and Diagnosis › Engine Performance › System › Engine Controls - Tests W/Codes - OBD-II › Trouble Code Charts › Code P0171 & P0172 - Fuel Trim › Notes

Code P0171 & P0172 - Fuel Trim: Notes

CODE P0171 - SYSTEM TOO LEAN (FUEL TRIM)
CODE P0172 - SYSTEM TOO RICH (FUEL TRIM)