Ruffus Magnium Posted March 27, 2015 Report Share Posted March 27, 2015 Sup, Just got a used Deville Concourse (always wanted) for the cheap. I have these codes I am trying to troubleshoot: p1571 p1644 p1602 p0441 Also have Traction System, ABS, and Break lights on. Also my backend swings over bumps. I have been fixing a lot on it already using these forums, so I figured I'ed join and ask a few questions. Please help get my land yacht Thanks again for any info Quote Link to comment Share on other sites More sharing options...
barczy01 Posted March 28, 2015 Report Share Posted March 28, 2015 EBTCM to PCM data link issure for torque request. Disconnect the ebtcm connector and make sure its clean and dry to start. Quote Link to comment Share on other sites More sharing options...
KHE Posted March 28, 2015 Report Share Posted March 28, 2015 Back end swaying when going over bumps is most likely the rear knuckle bushings. Grab the rear tire at the 12:00 position and move it in and out - any movement indicates bad knuckle bushings. Dorman makes replacement parts. Quote Kevin '93 Fleetwood Brougham '05 Deville '04 Deville 2013 Silverado Z71 Link to comment Share on other sites More sharing options...
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