How do you know if.....

[Big Bald]

.....your crank angle sensor or cam angle sensor is going bad? Does anything in particular happen or do you just wake up one day and you car won't start?

 

[DSMeclipse4G63]

dtc p1391 intermitten loss of ckp cmp (cam and crank sensors). So no you can pull a code for other then it not starting.
Andrew