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P1688 Diagnostic Trouble Code Discussion for March 2011

Unmanaged Engine Torque Signal Delivered To TCM

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Trouble Ticket Help Requests for DTC P1688
Help Request Posted
2000 Dodge Ram 3500 5.9L No Start VIN: 3B6MC3664Y
P1688: Internal fuel injection pump failure. ... fuel leak. We found the water separator valve leaking fuel. Replaced the valve and filter and all was well. 120 miles later the truck was towed in, will not start. Found the fuel filter housing empty of fuel and the battery's dead from cranking. Replaced b...
March 29, 2011