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P1688 Diagnostic Trouble Code Discussion for October 2004

Unmanaged Engine Torque Signal Delivered To TCM

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Trouble Ticket Help Requests for DTC P1688
Help Request Posted
1999 Dodge Ram 3500 5.9L Cuts out, MIL Lamp on VIN: 1B7MF3364X
P1688: Internal Fuel Injection pump ckp failure. This truck came in running fine. After extended driving check engine lite came on and now the engine can only go part to half throttle before the power drops off and bucks alot. All this is after I replaced those sensors. I am starting to think that the wire h...
October 13, 2004