out of a random act today I checked for some codes and see p1335 on my banks iQ.
P1335: EGR position sensor minimum/maximum stop performance - This code means that the EGR valve position voltage is greater than the allowable limit when closed and is not being commanded by the PCM. I have two different specifications for this: 1.3V>2.5 seconds and 1.5V>2.5 seconds but the indication is still the same. The possibilities include a stuck EGR valve, debris preventing the valve from fully closing, wiring concerns affecting the signal voltage or control circuits and the PCM.

-19000 miles and it was just in for service last week (oil change, fuel filters, tire rotation)
-no CEL or any indication that there was any problem other than a couple of extra regens over the last week.
-truck has the six gun tuner, iQ, Ram Air intake, and Monster Exhaust.installed.
-dieselkleen cetane boost is added usually every other tank

what does it mean and should i bother taking it in again with no other symptoms?

I occasionally (once in a blue moon) get p2002 because of the intake, but I have never seen any other codes on this truck until today.

should I clear the code and wait for a re-occurence? or is it serious enough that it cant wait and let the dealer see the code first?

 

Personally I'd check the wiring where it connects to the EGR valve. Ensure you have good contacts and just watch it.