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Mechanical Questions: 2006 Cadillac CTS 2.8L V6

Sep 16, 2017 1:54PM PDT

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
114k miles

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Did you fix the sensor issue?
Sep 16, 2017 2:22PM PDT

That is not just for smog so until you get all the codes fixed, nothing sounds too bad.

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Keep Looking
Sep 16, 2017 2:58PM PDT

All parts on a Cadillac cost double for any other car. An bad oxy sensor is the most difficult to replace. The oxy sensor may be OK, but with some hole in the exhaust it could be making the sensor throw the code. Replacement of a catalytic convertor may start at $200 BEFORE labor for replacement. If you live in a state that has vehicle emissions testing, then all that will need fixing for it to pass the test. I'd pass it by.

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