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P0403 Diagnostic Trouble Code Discussion for November 2016

EGR Solenoid Circuit Malfunction


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Trouble Ticket Help Requests for DTC P0403
Help Request Posted
2006 Mercury Mountaineer Luxury 4.0L MIL Lamp on VIN: 4M2EU47E66
P0403: EVR Control Circuit Malfunction. This has been a week of strange! I pulled wiring diagram and discovered that the codes listed are all powered buy the same circuit. Easy right? Find and replace the fuse then start looking for the short! Well not only is the fuse not blown but there is battery...
November 11, 2016