Acura is reporting that all 2007-08 RDX trucks, as well as 2009 models built from VIN 5J8TB1…9A000001 through 5J8TB1…9A007865, are prone to illuminating the amber brake system warning indicator and logging trouble code P16D9 in PCM memory. Acura attributes the condition to the PCM misinterpreting the feedback signals from the electric vacuum pump. Flashing the module with new software is the only way to eliminate the condition. Check with a dealer for the specifics of the reprogramming job.
Some 2005-09 Scion tC models may turn on the Check Engine light and store one or more EVAP system trouble codes in computer memory. The codes you might encounter are P0455 and P0441 together, or P0456 separately. All are attributable to an evaporative system leak caused by a poor fit between the gas cap and fuel filler pipe. Installing redesigned parts should eliminate further trouble. Order part No. 77201-21100 for the filler pipe or part No. 77300-33070 for the new cap.
Chrysler reports that the front passenger door power switches (door lock, seat, mirror, etc.) on 2004-08 Pacifica models may stop working for no apparent reason. One likely cause, says the manufacturer, is the interior door handle electronically zapping the door switch module with stray voltages. Installing a new-design, insulated door handle, part No. 68039248AA, should eliminate further trouble.