bredin01
Mar 25, 2013, 08:20 AM
I have 2 issues to ask about please. 1) I keep getting a PO 0420 code, off and on, about every 6 months. I have replaced all of the O2 sensors and the cat. Converter but this still occurs. Any advice? 2) I have some occasionally white, "oily" smelling smoke coming out of the exhaust pipe for a few seconds after starting it, after the mortor has been off for a while. I checked the oil after a recent oil change, after about 10 days of driving and it was about 1/4th of a quart low. Should I be concerned? What could this be? (There does not appear to be any visible leaks anywhere).