Two problems related to check engine light on have been reported for the 2003 Cadillac CTS. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Cadillac CTS based on all problems reported for the 2003 CTS.
Under 33,000 miles on this car. While driving down a hill I heard a lound clank noise. Car lost all steering and brake power completely locked up. Had towed to shop and they said timing chain is broken and passenger side of engine is locked up with bent valves. No warning what so ever. Check engine light never came on. Now this car needs a new engine.
Vehicle lost power when the consumer hit the brakes. The transmission jolts and then the engine shuts off. It has been to the dealer 6 times since January. The dealer tried something different every time she took it in. Manufacturer said she could have a new vehicle if she paid for it. She wanted to get rid of the vehicle. The check engine light illuminated.