Some 2011-12 Ford Explorers and 2011-13 Ford Edge and Lincoln MKX models may turn on the ABS or Advanced Trac warning light on the dash and log trouble code P193C and/or U0401 in computer memory.
According to Ford, the warning light typically comes on when the transmission is shifting gears or the engine is idling for a long period of time with the A/C system on, and is due to software anomalies in the PCM. Reprogramming the module with updated software is the only sure-fire remedy. Check with a dealer for the application 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].