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The code 1693 also shows up
Vehicle: 1998 Dodge Ram Cummins Diesel

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HI there

P1698 indicates the PCM is unable to communicate with the TCM. Typically this means one of the modules has failed.

P1698 DODGE - PCM Fault No CCD Message From TCM

Read more: https://www.autocodes.com/p1698_dodge.html

P1693  is for a problem with the turbo charger control system. This could be due to the PCM not working properly

P1693 DODGE - Turbo Charge Control Circuit Malfunction

Read more: https://www.autocodes.com/p1693_dodge.html

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