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P1688 Diagnostic Trouble Code Discussion for September 2005

Unmanaged Engine Torque Signal Delivered To TCM

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Trouble Ticket Help Requests for DTC P1688
Help Request Posted
2000 Dodge Ram 2500 5.9L No Start VIN: 3B7KF23651
P1688: internal pump problem. ... mechanic and am looking at this diesel for a friend of mine. This 4x4 3/4 ton has a code p1688 (internal injection pump problem). I don't deal with enough diesels to feel confident with diagnosing this problem and Mitchell is no help. I have plenty of (7ps...
September 21, 2005