I eariler had a problem with my 99 Dodge 2500 cummins truck wouldnt start. I got a tip to check my grounds, and they looked fine. I made an extra groundcable from the battery to the liftpump.

Every now and then the "check engine" light turns on. When I check the codes with my smarty, I find the codes P0336 and P1693. I dont use the smarty at this time, because I wanted to know if that had something to do with the codes. Apparently it doesnt..

Any suggestions, please?