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P3449 Diagnostic Trouble Code Discussion for March 2011

Cylinder 7 Deactivation Solenoid Control Circuit Malfunction

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Trouble Ticket Help Requests for DTC P3449
Help Request Posted
2008 Jeep Commander Overland 5.7L Misfire VIN: 1J8HG6821C
P3449: MDS solenoid circuit. This car has an occasional misfire at idle with it becoming more prevalent as you accelerate. This car can run well for a period of time (5-10 miles). If you watch the DRB you can monitor multiple misfires with #6 being by far the worst. MDS controlled cylinde...
March 23, 2011
2005 Jeep Grand Cherokee Limited 5.7L MIL Lamp on VIN: 1J4HR58245
P3449: MDS Solenoid 7 Circuit Malfunction. ... and P3449 in memory. First thing we did was change oil using 5W20 synthetic. Checked output to mds with Star Scan and # 7 was not activating. No voltage output from pcm. Replaced pcm and flashed with latest calibration. Had output for # 7 but solenoid dod ...
March 24, 2011