Some 2009 Lincoln MKS models with push button start systems may have difficulty turning over the engine or might not be able to turn the engine over at all.
Ford reports that the problem is limited to vehicles produced before Oct. 23, 2008, may be accompanied by a chattering sound from the starter solenoid and is most likely the result of a discharged or dead battery. Charging or replacing the battery, then reprogramming the PCM with updated software is the two-tiered fix.
For your information, the new software raises the idle speed to promote higher output from the alternator during low rpm operation. Check with a dealer for the specifics of the flash.
"Factory Fixes" is written by Jim DePalma, a 30-year veteran of the auto repair business who has served stints as a service manager, parts manager and ASE-certified technician. His column provides vehicle manufacturers' authentic factory technical service bulletins (TSBs) that have been condensed for easier reading. Mr. DePalma advises that techs always check with a dealer or repair information system for the latest revisions before starting to work on a vehicle. He can be reached via e-mail at [email protected].