Signs of a Bad O2 Sensor?
Symptoms include poor gas mileage, rough engine idle, starting trouble, and even failure of the catalytic converter. Often, the check engine light will come on to provide OBD II trouble codes to check with a code reader. Garage replacement service for a bad oxygen sensor can be pricey, but changing your own sensor is generally an easy DIY job that can make your car run smoothly again.
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