I have recently replaced cam sensor bank 1 on 2003 I35 with 90,000 miles due to stalling while driving. Now I am having a hard time getting the car started and the slip light, tcs light and service engine soon is still on? Any ideas on what this could be? It fixed the stalling issue now I have to crank the car up to 4 times before I get it started.

 

I don't know if this helps, but I had a similar problem. Had trouble starting and TCS and SLIP light as well as service engine soon came on. After a few starts, SLIP and TCS disappeared, but service engine soon stayed on. Took it to dealer and they replaced cam sensor 2. Now I'm all good, no problems! You may just want to have them look at it to see what they say. It's around $350 for parts plus labor but reliably starting may be worth it. Best of luck.
James