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P1389 Diagnostic Trouble Code Discussion for December 2008

No Auto Shutdown Relay Output Voltage To PCM

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Trouble Ticket Help Requests for DTC P1389
Help Request Posted
2001 Dodge Ram 1500 Laramie 3.9L No Start VIN: 1B74C16X61
P1389: no auto shutdown out put voltage. This truck was towed in no start. Has good fuel pressure, good spark output, cranking rpm signal but no injector pulse. The injectors have power but the PCM is not grounding the injectors when cranking, if you spray some carb cleaner down the throttle body the...
December 09, 2008