Flash: Powertrain Control Module (PCM) Updates

Bulletin number

18-038-21

Component

Exterior lighting

Summary

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 the technician may find one or more ofthe following DTCs have been set: P2110 - Electronic Throttle Control System Bank 1 - Forced Limited RPM. P2173 - High Airflow/Vacuum Leak Detected (Slow Accumulation). U0100 - Lost Communication With ECM/PCM. P0456 - EVAP System Small Leak.If DTC P0456 is present use the wiTECH Small Leak Verification Test (SLVT) to determine if a leak is present in the system. P1CEA - Boost Side EVAP Purge System Performance. In addition, the customer may also experience the following: The vehicle will not crank if the ECM gets hotter than 50 °C (122°F). Intermittent no-crank when first starting the vehicle. The following Diagnostic Trouble Codes (DTCs) have been changed from a one trip fault to a two trip fault: P0607 - ECU Internal Performance.

Owners of these vehicles have filed 3 complaints in the lights category.