1800722

Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Powertrain Control Module (PCM) with thelatest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may findthat one or more of the following Diagnostic Trouble Codes (DTCs) have been set: P064F - Unauthorized Software/Calibration Detected. P2201 - Aftertreatment NOx Sensor Circuit Performance - Bank 1 Sensor 1. P24C7 - Particulate Matter Sensor Temperature Circuit Performance. P1C55 - NOx Sensor Intermittent - Bank 1 Sensor 1. P202E - Reductant Injector Performance. P218F - Reductant No Flow Detected. In addition, the following software enhancements are also available: Fuel filter minder improvement. Calibration changes to engine-off timer. Changes to engine warm up protection. Hydrocarbon Desorption (HCD) driveability improvements. A/C pressure sensor update. Exhaust Gas Recirculation (EGR) calibration changes.