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Old 08-25-2005, 01:50 AM   #1 (permalink)
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Bad O-2 Sensor? - RX 300 Gas Mileage Takes a Nosedive
I have an 02 RX300. It has about 61,000 miles on it. It has recently felt very sluggish, and the gas mileage has plummeted from about 20 to about 16 mpg. The reduction in gas mileage happened almost overnight. I've run some Techron thru the system to see if the injectors needed a bath, but that didn't help.

Anyone have any thoughts? I'm thinking I have a bad O-2 sensor.

Thanks.

Scott
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Old 08-28-2005, 03:55 PM   #2 (permalink)
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a bad O2 should trigger the CEL. How do you know it happened almost over night? Did you fill up a couple days apart? When do you get tuned up?
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