Flash: Powertrain Diagnostic and System Improvements This bulletin involves reprogramming the Powertrain...

Bulletin number

18-048-16 REV. A

Component

Power train: automatic transmission: control module (TCM/PCM/tecm)

Summary

Flash: Powertrain Diagnostic and System Improvements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Codes (DTCs) set in the PCM memory: P0335 - Crankshaft Position Sensor Circuit. P0456 - Evap System Small Leak. P219A - Bank 1 Air Fuel Ratio Imbalance. P050B - Cold Start Ignition Timing Performance.The following software enhancement is also available: Engine is hard to start at temperatures -29°C (-20°F) for vehicles utilizing E15 fuel only (Sales Code ECN). Cruise control acceleration rate may be considered objectionable to some customers if the accel button is held down.

Owners of these vehicles have filed 54 complaints in the transmission category.