Flash: Powertrain Control Module (PCM) Updates
This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation, a technician may find one or more of the following DTCs have been set: P06E9 - Engine Starter Performance, U0418 - Implausible Data Received From Brake System Control Module 1, U0432 - Invalid Data Received From Multi-Axis Acceleration Sensor Module, P06EF - Engine Restart Performance.Software update will help reduce engine crank time, setting a false P06EF, P00FD - Battery -B- State Of Charge Performance, C2222-68 - Improper Powerdown - Event Information, P0607-00 - ECU Internal Performance - ESM, U0402-00 - Implausible Data Received From TCM, U145D-00 - Implausible Data Received From TCM On D-PT, U1465-00 - Implausible Driver Shift Request Signal Received, P0456 - Evap System Small Leak. If no faults were found when performing normal diagnostic, perform this softwareupdate.
P258B - Electronic Vacuum Pump Performance. P0503 - Vehicle Speed Sensor 1 Erratic.
Customer may also experience one or more of the following:Customer or technician may be unable to read data information from the OBDII connector when using a generic scan tool (APAC only).
Rough Idle. Vibration felt in the seat at Idle. Idle undershoot, just before a complete stop. Engine Start Stop (ESS) disabled during an autostart, requiring the driver to key restart. ESS message appears in the Electronics Vehicle Information Center (EVIC) ?Stop/Start Restart Required Fault Detected?. This software release also includes the following software enhancements:Prevent the ESS Aux battery from drying out on vehicles driven in hot regions and conditions. AGS controls modifications to reduce engine compartment temperatures. Limp home RPM correction in a double pedal fault scenario. Improvements to address an occasional engine stall during a panic brake situation from 45 kph (28 mp
