18-002-13

Flash: MIL Illumination P000B, P050B and/or P2173. Includes Driveability/Transmission Enhancements This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software. A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the Technician may find that any of the following Diagnostic Trouble Codes (DTC's) have been set: ? P000B- Exhaust Slow Response Bank 1 ? P050B- Cold Start Ignition Timing Performance ? P2173- High Airflow/Vacuum Leak Detected (Slow Accumulation) Driveability and Transmission Enhancements are also included with this software release. These changes include the following: ? Engine idles rough after an overnight soak but clears up as the engine warms up ? Improved garage shift feel and quality ? Improved extended idle evap purge strategy ? Reduced visible steam from under hood when idling in cool, damp conditions Updating the software will correct the conditions listed above.