Some 2009 Ford Escapes and Mercury Mariners with 2.5-liter engines and six-speed automatic transmissions may exhibit a rough idle when first started after a prolonged period of inactivity (usually overnight).
According to Ford, the idle trouble usually occurs with the transmission in drive and the engine loaded (such as when the air conditioning is on). It is due to software anomalies in the PCM.
Reprogramming the module with updated software is the only remedy. 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 email at [email protected].