I'm sorry that I bother you again but I would like to ask an expert so I would turn to you.
So I have a Chrysler Concorde 2.7L V6 car that has 107600 miles and it was made in 1999. You might remember that my car has suspicious blue smoke and I got compression test and it turned out I got low (but not terribly low) compression on two valves. You can look back our conversation too.
So I have been using BG products since 2 oil changes. (BG oil treatment RF-7, and BG Engine quick clean). I drove 900 miles in 3 months so I got another oil change with BG products again. I moved to a different place so I assume will go 1500 miles in 3 months. This engine requires extra care (sludge cleaning) and 3 months/3000 mile oil change. So I change it due time. To be honest I experience better performance, smooth run and much less smoke and I drove less then 2000 miles so I guess BG products help. Of course I also use Lucas fuel injector cleaner every oil change.
Anyway today I got check engine light (yellow) and I was freaked out so I went to auto zone to read the computer for error code. I was told my o2 sensor has problem (bank2). The guy told me it is not a big deal. According to him I will not break down because of bad o2 sensor. That sensor in bank2 was changed in 11th of November, 2008, 5500 miles ago. Do you think it should have last more? I think it went wrong because my possible bad valve seals or worn piston rings (lower compression) that lead to excessive oil consumption although BG products + Lucas treatment decreased oil consumption significantly. The guy at auto zone reset my car's computer and said if the problem came back I should change it. He said if the problem did not come back I would not need to worry. He also told me that he had driven his car with bad o2 sensor for 6 months and nothing bad happened.
So my questions:
1, Is he right that I will not brake down because of this? I mean what if I don't change o2 sensor now just 2 month later? I think catalytic converter can overheat or not?
2, Why did it go wrong?
3, Can I change it home in my garage? I mean is it hard to do on my car?(1999, Chrysler Concorde, 2.7L V6)
Thank you for your time and help!
Friday, August 21st, 2009 AT 7:33 PM