I own a 2004 S60 2.5T, Vehicle has 66,000 miles on it. I decided to have the spark plugs and timing belt/tensioner/idler changed as a precaution due to other posts that I have read. <p>I recieved the car back and started and drove it 4-5 times before the CEL came on. Took the vehicle to Auto Zone for a quick code pull and the following codes were identified:<p>-P0193<br>-P0299<p>I have read that the P0193 is most likely the fuel rail pressure sensor, but I am up to any suggestions<p>The P0299 code is what bothers me the most. Low boost pressure code. Any suggestions would be great in resolving my problem.