Owners of 2005 Jeep Liberty and Cherokee models with 2.8-liter diesel engines may come into your store concerned by higher-than-normal temperature gauge readings.
Chrysler says the condition occurs most frequently in hot ambient temperatures or while driving uphill or towing a trailer, and that the temperature gauge usually will reach slightly above the ¾ mark, but the engine won't overheat.
One likely cause is the temperature gauge misinterpreting the signals from the coolant temperature switch. Reprogramming the instrument cluster control (CCN) module with updated software should take care of the gauge woes.
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].