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Code 171 on a 2000 Lexus RX 300 typically indicates a lean condition in the engine, meaning that the air-fuel mixture has too much air and not enough fuel. This can be caused by various issues, such as a vacuum leak, a faulty mass air flow sensor, or fuel delivery problems. Addressing the underlying cause is essential to restore optimal engine performance and efficiency. It's advisable to have a professional diagnose and resolve the issue.

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1mo ago

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