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Old 11-25-2003, 11:33 PM
Berolina Berolina is offline
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Join Date: Feb 2002
Location: Osoyoos, British Cumbia
Posts: 21
O2 Sensor Question

Is it possible for a O2 sensor to be defective even though the light on the dashboard does not come on?
Also is there a way to test this sensor?

My gas mileage has suddenly dropped to below 10mpg and I am told the O2 sensor is the likely culprit.

1987 420SEL
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