Some 2007 Dodge Calibers with 2.0-liter or 2.4-liter engines and CVT transmissions built from May 11, 2006 through Aug. 16, 2006 may produce a pinging noise under moderate acceleration.
According to Chrysler, the noise usually occurs when the outside temperature is above 60 degrees and may be accompanied by an illuminated check engine light, with trouble code P2173 and/or P0452 stored in the computer's memory. Software issues in the PCM are the most likely cause of the trouble. Reprogramming the module with updated software files is the only surefire 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].