Potential EGR Issues (Page 2/2) sjmaye APR 16, 04:17 PM quote Originally posted by Gall757: I would deal with the code 44 first. As a general rule, fix the higher number codes first, and the others may take care of themselves. As you have seen, the code 32 is not a serious performance issue. Not sure code 44 is a serious performance issue either. The car runs fine. I will check it though. Thx for the tip/ Gall757 APR 16, 07:00 PM Bad O2 sensors will change the fuel mix, so it's likely mileage will be affected as well as emissions. sjmaye APR 17, 11:12 AM quote Originally posted by Gall757: Bad O2 sensors will change the fuel mix, so it's likely mileage will be affected as well as emissions. I am in the process of checking this. A question on contaminating an O2 sensor- My car runs fine, but will put out some blue smoke when started after sitting a bit. This stops within seconds of starting. Is it possible this much oil smoke could contaminate a O2 sensor?