intermitten starting problem

[cummins5.9]

i have a 2001 that wont start sometimes. it has a superchip and afe intake and 5 inch with a ppe fuel pump. i'll be going down the road and it will throw a code and the tach will quit working and it will lose a lot of power. if i shut it off and clear the code sometimes it wont start. the code is PO336 and another code it throws is PO602. has anyone had any problems like this??

 

[vpdually]

po336 is the crankshaft position sensor and thats what it sounds like to me, id start there

 

[cummins5.9]

Starting problem

We put a new crank position sensor in and it has ran great ever since