also when you kill your truck the fan should stop withing a second or less. if it free wheels for a few seconds after you kill it then its bad.

 

the p0336 code for the CKP sensor usually comes on when the engine is running rough or i have heard of boxes and programers setting it the fan speed p-code is a rationality code, and the map sensor code was also probly set by your BDDL. i would clear the codes and run with it, if one of the codes comes back repeatly, let me know i will e-mail you the testing flow chart.

 

The RokkTech sensor is an aftermarket part that advances your timing by 2 degrees max - helps with fuel economy and low-midrange torque, since the common rails are designed to be "retarded" from the factory for emissions considerations.