Probably asked for more than the pump could provide, and since your tricking it, it caused the CEL.

 

The HPOP? I have not hooked up the gauge to check high pressure yet. I guess I should. Stop guessing.

 

Well, it is possible for you to call for more oil than the 15° pump can provide with the ICP mod depending on the miles of your truck.

The ICP mod tricks the computer into calling for a higher IPR Duty Cycle to provide more oil to the injectors.
You probably got a, ICP above/below desired, code.

 

This one is only 156,XXX. It's the 12' bed truck. I guess I'm having some personality issues wanting to get more power out of ton truck. But a little more power on the hill feels good. I guess I will study up on HPOP's.Thanks

 

not to hijack, but exhaust and intake make a big difference in what your motor can do.

just those simple things bring out the power in the motor.

You can get a T-500 from Joey at TerminatorEngineering.com

You have plenty of vehicles to drive. So, Send him in your 15, and he'll upgrade it to a 17 degree pump.

 

Both PSD's are running 3 " DP and 6637 filter coupled to factory exhaust I was hopin not to make an upgrade till i have to. Might take your advise because if I'm having any problems now, then 160 cc's are not in my future till it's resolved.