Acura reports that some 2007-09 RDX SUVs are prone to illuminating the amber brake system warning lamp and storing trouble code P16D9 in computer memory.
The Japanese car maker attributes the condition to the PCM misinterpreting the feedback signals from the electric vacuum pump.
Updating the module with new software is the only remedy.
Check with a dealer for the application specifics.
"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].