Question about Dodge Ram Pickup 2500
The p1690 is the transfer pump code I believe. Unfortunately the engine will run without a good transfer pump for awhile. Eventually the main injection pump will fail due to lack of fuel pressure. The main injection pump requires 6 psi minimum. When the main pump fails and this is the unfortunate part it's trash. It is possible you just lost enough fuel psi that it died and a 160 dollar lift pump will fix you up. I would suggest a fuel psi gauge on all 98 and a half through 2002 dodge diesels. A 80 dollar gauge can save you about 1800 dollars and that 1800 is if you do it yourself.
Posted on Nov 30, 2010
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Posted on Jan 02, 2017
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