18-021-15

Flash: 3.0L Powertrain Diagnostic And System Enhancements 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: ? P20C2 - Reductant Heater 3 Control Circuit Performance. ? P204F - Reductant System Performance. ? P20E9 - Reductant Pressure Too High. ? 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 -