Flash: Powertrain Diagnostic and System Improvements
This bulletin involves reprogramming the Engine Control Module/Powertrain Control Module (ECM/PCM) with the latest available software.
Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that the following Diagnostic Trouble Codes (DTCs) have been
set: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.
