Daewoo Broken camshaft Sensor

I have a daewoo leganza, which has been making a lot of noise when I my foot is stopped and running, accelerating poorly, and getting no pickup. I took it to Meineke and was told that its catalytic converter was broken. However, when I took it to the Daewoo dealer, I was told that the catalytic converter, which is under warranty was not the biggest problem, but that the camshaft sensor was broken and need replacement and will cost about $200. I am going to trade this car after I repair it, but I do not want to spend too much money on it. Do you think that the car will run fine once the catalytic converter is fixed, or should I also fix the sensor?