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P0603 Diagnostic Trouble Code Discussion for May 2010

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 XLT 7.3L MIL Lamp on VIN: 1FTNX20F1X
P0603: PCM Keep Alive Memory Test Error. Vehicle does not appear to have a glow plug problem. I see it as the PCM not recognizing GPR energizing both side GP's. Computer appears to work the GPR properly, it energizes GPR when EOT is less than 131 degree. In AM or when completely cold the GPR stays en...
May 11, 2010
1999 Ford F-250 Super Duty XLT 7.3L MIL Lamp on VIN: 1FTNX20F1X
P0603: PCM Keep Alive Memory Test Error. Vehicle does not appear to have a glow plug problem. I see it as the PCM not recognizing GPR energizing both side GP's. Computer appears to work the GPR properly, it energizes GPR when EOT is less than 131 degree. In AM or when completely cold the GPR stays en...
May 11, 2010