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What exactly does the P1688 code mean? the vehicle is a 2001 dodge cummins

Vehicle: 2001, dodge, cummins, 5.9L

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Hi there,

This code indicates an issue with the fuel pump module. Here is a list of possible causes.

P1688 DODGE - Internal Fuel Injection Pump Controller Failure

Read more: https://www.autocodes.com/p1688_dodge.html

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