Quote:
Originally Posted by bmobile
Update: I took my car into an indy BMW specialist on Monday for an oil change, brake fluid flush and vehicle check. These were all coming due(I'm at 56k miles) so I wanted to take care everything at once.
Long story short, they didn't have the o2 sensor in stock(though I mentioned this when making the appointment) so I planned to make another appointment for the following week. I picked up the car and drove it to work. As expected, the increased emission light was still on and the car felt fine. On the way home from work, I pushed the car a little on the highway and it definitely felt sluggish at high rpms. I stopped for gas and when I started it up again, the fault did not return. "All Systems OK"
I've driven maybe 50-60 miles since and the light has not returned and although the power seams to be coming back, it's not quite where it was before taking it to the shop. The mileage seems normal so I'm planning on waiting until the next time I need to get my car serviced(spark plugs, oil change) to change out the o2 sensors, or when the SES-increase emission warning light returns
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I think you're doing yourself and the car a disservice by driving it with a preexisting o2 sensor issue (especially for pre-cat). You should change that sensor as soon as possible and not wait for the light to return.
Feedback from the pre cat o2 sensors are essential to fuel mixture correction - which means that if not reading properly that it can cause loss of power, poor consumption, lean conditions, etc.. I would suggest taking care of it before your service.
