Need a answer to p1689 code please
 

If my truck threw a p1689 and I cleared it should it come back again as I try to start the truck? if it does not come back does that mean ecm and vp are ok?

i have that code all the time it comes with my programmer lol

Could be a bad connection too. Worthwhile to check your grounds for looseness, corrosion, etc...

Check the fuel system relay. swap it with another in the fuse box.

i also have that code at all times ever since i bought and installed my smarty programmer on my 2001 :c:

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P1689 - No communication between ECM & Injection Pump Module

could it mean the vp44 is going out? because mine thru that code and my truck died on the road. i have lost all power and fuel milage even tho the code went away. ive checked all wires and there fine.

Do you have a fuel pressure gauge? If so did your pressure drop rapidly or was it running lower than normal?

Check out bluechipdiesel.com... It will tell you everything you need to know about your fuel system.