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P0603 Diagnostic Trouble Code Discussion for December 2005

Control Module Long Term Memory Reset

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Trouble Ticket Help Requests for DTC P0603
Help Request Posted
1999 Ford F-250 Super Duty Lariat 7.3L No Start VIN: 1FTNX20F9X
P0603: PCM Keep Alive Memory Test Error. Hello all you diesel tech's.I am having a problem with this thing.Very strange problem,vehicle will not start sometimes when cold.When this happens the IDM relay will turn on and off rapidly.Also, the wait to start,and water in fuel light turns on and off at t...
December 05, 2005