That is not just for smog so until you get all the codes fixed, nothing sounds too bad.
I'm looking to buy a 2006 Cadillac CTS. I test drove it today and noticed a few things, I've never driven a Cadillac before so I don't know if these things are a "norm". I noticed first that the exhaust seemed "deep". Not too loud but it had a sports car tone, I'd imagine a Cadillac would be a quiet car. The car has the 2.8l V6 but it seemed VERY underwhelming. The check engine light was on and I got a P0008 code which the dealer told me was an o2 sensor. Either way, I felt like I was driving a brick. Now when I turned the A/C on it worked, but at a red light the cars rpms seemed to drop below 1k and i could feel a "shudder". The car had been sitting there in the lot for awhile untouched so maybe it is just running funny from sitting there? If anyone has any experience with these cars let me know. If you need more information I'll try my best to get that for you.
My questions are 1. Should the exhaust sound so "loud". 2. Is this car just a underwhelming V6? 3. What could cause the drop in RPM's and the "shudder" with A/C on?
2006 Cadillac CTS 2.8L V6
With automatic transmission