other than check engine light, what symptoms exist in having a bad oxygen O2 sensor?
 

other than check engine light, what symptoms exist in having a bad oxygen O2 sensor? i heard from my mechanic that the car would bog and it wouldnt run as smooth and hard as it should if the O2 worked fine.

Re: other than check engine light, what symptoms exist in having a bad oxygen O2 sensor? (JinDIESEL)
 

Slight stumble, decreased gas mileage, very lean or rich readings on the spark plugs.