18-067-22

Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Engine Control Module (ECM), also known as a PCM with the latest available software. This software update will need two flashes to update the ECM. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Code (DTC) has been set: P2AC0-00 - Intake Air O2 Sensor Reference Voltage Circuit Range/Performance Bank 1.