Have you had any major work done like a timing chain or head gasket ? let me know Thanks ROY!
How many mile do you have on your car? let me know Thanks ROY!
We have had a lot of control unit problems with the 2001 and 2002 sentra for lack of power and no start problems , one more thing I have seen on the sentra when the cam sensor code keeps coming up, is when the timing chain jumps timing on the cam sprocket and the cam and crank sensor will be off timing and kick a sensor code like you have . have you had the recall done for the control unit foam here is the recall , if not it could be damaged, Thanks let me know if you have more questions, ROY!