Hi new to this site have a question;
I have a 99 Dodge Ram 2500 24V with auto, and am getting a code of P1689 and only that code. The truck will shut down going down the road, or sometimes the code will appear before I start the truck. Took the truck in and had a new VP44 and tranfer pump put in drove down the road a few miles and it did the same thing, took it back so they said it was the APPS so had a new one of those put on. No luck still getting the 1689 code.
What to do?? Tired of throwing money at the truck.
This ad is not displayed to registered and logged-in members. Register your free account today and become a member on Dodge Forums!
Could it be a camshaft position sensor? or crankshaft position sensor? If this mill has these sensors, I would look at those. But I haven't work on one of these before so I am not sure about it. Check for any loose, worn connections or corroded connections.
I dont know what code P1689 exactly is but I do know it is a Specific Chrysler/Dodge code.
Jim "Iron Giant" Fahlin ~ A high performance car is like a guitar, you have to tune it to achieve your best operation and pull ahead of the competition.
P-1689 no communication between ecm & injection
pump module (obd ii)
fuel inj pump gnd ckt open or high resistance
fuel pump ctrl mod harness observable defect
datalink (+) circuit open
datalink (+) circuit short to ground
datalink (-) circuit open
datalink (-) circuit short to ground
engine control module defective
I would start with disconnecting the batteries and then clean battery post, then move on to the cables. Clean the cables well bothe ends clean the area where the negatives contact the "grounding" area. After cleaning the battery posts, cables and contact areas spray on some terminal coating.
try this see if this makes a difference, been a number of guys having like issues and had the problems go away after cleaning up the connections.
OK> cleaned the negetive battery conection at the front of the block, also the one on the pass. side of block, cleaned both batt. terminals and all neg. conections to fenders and under hood area I could find. Also this is somthing that HELLACIOUSHEMI had sugested so thanks to all for the info.
Will see if it works...
Keep us updated what you find. Mine is doing the same thing. I called bluechip the other day, he told me the electronics on the vp44 were going bad. I just need to come up with the extra$$$ to see if he was right
No luck, drove into town drove fine, came back out of the store and turned the key on and the "check engine light" wouldn't go off so I checked with code reader and same code P1689. Cleared codes drove home did fine.
Still don't know, if there is any more sugestions please feel free
Thanks (MORE MONEY I guess!!!)
My truck had the 1689 and 1693 witch im told is just saying the 1689 exist in the computer and is nothin to pay attention to.
I replaced both my lift and injection pump. just went with the ddrp fass pump and stocker injection. When i orderd the pump i made sure it came with a new upgraded ecm. some places i called just left the old one on and shipped it out. kinda if it didnt need replaced why fix it mato. hope you get it runnen hate to pass a fellow cummins
Dealing with the same issue truck has 79,000 miles all the grounds are good I checked the wires between the injection pump and ecm all ohm'd out fine. The thing that helped the most is I hooked up the cummins go no go box to the injection pump before I went and spent the money on the pump and it tested out fine. The issue was a bad ecm what can kill the ecm is if you arc'd a battery cable or if you have ac voltage "mine was a battery cable" ac voltage coming from your alternator my ac voltage was .01 if it is higher than .1 you have a bad alternator,ecm and just hope it didn't get the computer on the vp44. This can be tested by placing a volt meter on the driver side or passenger side battery start the truck check for DC voltage and make sure it's charging then turn your volt meter to ac voltage still hooked to the battery. This will tell you if you have ac voltage feeding back.