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P0603 Diagnostic Trouble Code Discussion for April 2011

Control Module Long Term Memory Reset

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Trouble Ticket Help Requests for DTC P0603
Help Request Posted
1997 Ford F-250 7.3L No Start, Stall VIN: 1FTHX26F1V
P0603: PCM Keep Alive Memory Test Error. Customer had oil changed at local quick lube, after oil change engine just cranks but won't start. Customer noticed that "Wait to Start" light did not come on when key was turned on. I ran over there and found the IDM relay buzzing in relay box. Switch...
April 28, 2011