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I had this happen to me in mine. Your oxygen sensor is probably bad. It's located between the Air filter housing and the intake and costs about $160.00 for the part. It's easily replacet as you only unplug it, and remove it by the 2 screws holding it in the air duct work just past the air filter housing. If your "Service engine soon" light came on, have the code checked. Autozone auto parts store will do this for free if there is one near you. Good Luck michaelward10@hotmail.com

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Q: How could your gas mileage drop off rapidly in your 2000 le saber?
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