18-028-14 REV. D

Flash: MIL Illumination - Diagnostic and System Improvements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. It also involves replacement of the Oxygen (O2) Sensor and cleaning or replacement of the Exhaust Gas Temperature (EGT) Sensor 1/2 if necessary depending on Diagnostic Trouble Codes (DTC) that may have set. A small number of customers may experience an intermittent engine shudder or vibration which may not set a Diagnostic Trouble Code (DTC). In addition other customers may experience a Malfunction Indicator Lamp (MIL) illumination upon which the technician may find one or more of the following DTCs have been set: P016A-00 - Excessive Time To Enter Closed Loop Air/Fuel Ratio Control. P2459-00 - Diesel Particulate Filter Regeneration Frequency P0133-00 - O2 Sensor 1/1 Slow Response P2084-00 - Exhaust Gas Temperature Sensor Circuit Performance - (1/2) P0171-00 - Fuel System 1/1 Lean P0426-00 - Catalyst Temperature Sensor Circuit Performance (1/1) P0045-00 - Turbocharger Boost Control Circuit/Open P0087-00 - Fuel Rail Pressure Too Low P009A-00 - Intake Air Temperature/Ambient Air Temperature Correlation P0128-00 - Thermostat Rationality P0234-00 - Turbocharger Overboost Condition P0420-00 - Catalyst Efficiency (Bank 1) P05F8-00 - Reductant Heater Control Module Performance P050E-00 - Cold Start Engine Exhaust Temperature Too Low P200A-00 - Intake Manifold Runner Performance - (Bank 1) P200B-00 - Intake Manifold Runner Performance - (Bank 2) P202E-00 - Reductant Injection Valve Circuit Performance P204F-00 - Reductant System Performance P2080-00 - Exhaust Gas Temperature Sensor Circuit Performance P20BA-00 - Reductant Heater 1 Control Circuit Performance P20BE-00 - Reductant Pressure Line Heater Control Circuit Performance P20C2-00 - Reductant Heater 3 Control Circuit Performance P20E9-00 - Reductant Pressure Too High P225C-00 - NOX Sensor 1/1 Performance - Signal Stuck High