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P1405 Diagnostic Trouble Code Discussion for November 2004

DPFE Sensor Upstream Hose Off or Plugged

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Trouble Ticket Help Requests for DTC P1405
Help Request Posted
1994 Buick Century Custom 3.1L MIL Lamp on VIN: RRR6425548
P1405: 3 egr solinoid malfunction. Codes will set after driving a while and pcm will see solinoids fail. Pcm will set codes for the #3 solinoid first, then set code for #2 solinoid next. I can ground out each solinoid and cause egr to work and notice a drop in rpm with each one. I can test driv...
November 10, 2004