Ford
Some 2006 Ford Fusions and Mustangs, Lincoln Zephyrs and Mercury Milans with 4.6-liter engines may illuminate the check engine light and log trouble code P1000 in computer memory at high altitudes. According to Ford, if there are no other codes stored and clearing the code proves impossible, you're likely dealing with software gremlins in the PCM. Reprogramming the module with updated calibration files is the only solution. Check with a dealer for the specifics of the flash.
Chrysler
Some 2001-05 Town & Country, Caravan and Voyager minivans may produce a knocking or rattling sound from the front suspension when driven over rough or uneven road surfaces.
Chrysler says the problem only afflicts minivans built on or before March 1, 2005, and is caused by the front sway bar making contact with the frame. Upgraded front sway bar bushings are now available to address the noise condition. Order part no. 04743024AD for vans with 26mm stabilizer bars or part no. 04743041AD for models with 26.5mm stabilizer bars.
Nissan
Nissan reports that some 2001-02 2WD Frontier pickups and Xterra SUVs built before May 1, 2002, may turn on the ABS light dimly while being driven or with the engine off and the ignition on. According to the Japanese car maker, there's a good chance the warning lamp is bogus, and the result of software issues in the ABS module.
To make a definitive diagnosis, hook up your scanner and check for codes in the ABS module. If you find any codes, do the necessary repairs, then go on a road test to verify that the warning light stays off. If there are no codes stored, however, that's a hint that the ABS module has software gremlins. Installing an updated module, part no. 47850-8Z400, should eliminate further trouble.
"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].