I have a 95 850 glt n/a engine number B5254S ... ok i have 2 easy questions one my check engine light came on and i got it checked through the diagnostic port and it said slow response from the o2 sensor they cleared it and it came back about a week later ... Does this mean the car needs a new one its about ready to go or could it be something else wrong. I checked the codes under the hood and it also came up oxygen sensors. The next one is stupid when i went to price a o2 sensor they asked if i had a pump or no i have no idea what pump they askin for does anyone know if that engine has one and whatr pump it is.?
thanks
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