Ford says some 2005 F-150 pickups with three-valve, 5.4-liter engines built between Aug. 23, 2004 and Jan. 15, 2015 may turn on the check engine light after a cold start, and set trouble code P061B and/or P2106 in PCM memory.
According to the car maker, the problem usually occurs while the transmission is rapidly shifted from neutral into drive or reverse, and is most likely due to software anomalies in the PCM. Reprogramming the module with updated software is the only guaranteed fix. 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].