"FLASH: POWERTRAIN DIAGNOSTIC AND SYSTEM IMPROVEMENTS
THIS BULLETIN INVOLVES REPROGRAMMING THE POWERTRAIN CONTROL MODULE (PCM) WITH UPDATED
SOFTWARE.
THE CUSTOMER MAY EXPERIENCE A MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATION OR NOTICE
THAT THE FUEL SAVER INDICATOR LIGHT (FSI) IS TURNING ON AND OFF.
UPON FURTHER INVESTIGATION THE TECHNICIAN MAY FIND ONE OR MORE OF THE FOLLOWING DIAGNOSTIC
TROUBLE CODES (DTCS):
· **P0452 - EVAP PRESSURE SWITCH STUCK CLOSED (10 MY WITH SALES CODE DEH
ONLY).**
· U0140 - LOST COMMUNICATION WITH BODY CONTROL MODULE. ATTEMPTING TO CLEAR THE
DTC MAY BE UNSUCCESSFUL.
OTHER ENHANCEMENTS INCLUDED IN THIS UPDATE:
· IMPROVED FUEL PUMP RELAY OPERATION.
· IMPROVED REMOTE START TIME AFTER KEY ACTIVATION.
· IMPROVED AUTOMATIC SHUTDOWN RELAY (ASD) TIMER CALIBRATION.
· FIX FOR FALSE (FSI) LIGHT ON (WITH COMBINATION SALES CODES EGT AND DEH)."
