F 350 2WD Super Duty V8-6.0L DSL Turbo VIN P (2004)
P0680 - P0684: Testing and Inspection
For diagnosis of code P0683 refer to chart
P0623-P1531
If there is no link in the chart then:
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This code is not a valid code for this vehicle
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Or information published by the manufacturer for this vehicle did not include this code