2001 Volvo S60

Engine Performance problem
2001 Volvo S60 6 cyl Front Wheel Drive Automatic 103, 00 miles

Last Friday the car was running very rough. I added a fuel treatment to the tank and the car smoothed out and ran fine. Today when I tried to start the car it would not start. The engine would turn over fine and hit a lick periodically. I connected a code reader and it said codes, 1603, 1602, 1600. Please advise the code meanings. Thanks, DRC
April 12, 2009.

Looked codes up and found they are throttle codes. Your electronic throttle is covered for 10 years 200k miles so it would be better if you have your vehicle towed to your Volvo dealership and have them diagnose it and verify that it is a throttle problem.

Apr 12, 2009.