18-023-15 REV.C

Flash: 3.0 L MIL Illumination Diagnostic and System Improvements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. It also involves the cleaning or replacement of the Exhaust Gas Temperature (EGT) Sensor 1/2 and/or Catalyst Temperature Sensor if necessary depending on Diagnostic Trouble Codes (DTCs) that may have set. A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the Technician may find one or more of the following Diagnostic Trouble Code(s) may have been set: P20C2-00 - Reductant Heater 3 Control Circuit Performance. P204F-00 - Reductant System Performance. P20E9-00 - Reductant Pressure Too High. P249C-00 - Excessive Time To Enter Closed Loop Reductant Injection Timing Control. P1288-00 - NOX Sensor 1/2 Zero Offset Too High. P2002-00 - Diesel Particulate Filter Efficiency Below Threshold. P2299-00 - Brake Pedal Position / Accelerator Pedal Position Incompatible. P241D-00 - Scr Inducement - Forced Engine Shutdown.P0420-00 - Catalyst Efficiency (Bank 1). P1297-00 - EGR Slow Response - Decreasing Flow. P208B-00 - Reductant Pump 1 Control Performance. 0087-00 - Fuel Rail Pressure Too Low. P20EE-00 - SCR NOX Catalyst Efficiency Below Threshold Bank 1. P225C-00 - NOX Sensor Performance - Signal Stuck High Bank 1 Sensor 1. P225D-00 - NOX Sensor 1/1 Performance - Signal Stuck Low. P1289-00 - NOX Sensor 1/2 Zero Offset Too Low. P1296-00 - EGR Slow Response - Increasing Flow. P2BA9-00 - NOX Exceedence - Insufficient Reagent Quality. P2080-00 - Exhaust Gas Temperature Sensor Circuit Performance. P2084-00 - Exhaust Gas Temperature Sensor Circuit Performance-Bank 1 Sensor 2. P0426-00 - Catalyst Temperature Sensor Circuit Performance Bank 1 Sensor 1. P242B-00 - Exhaust Gas Temperature Sensor Circuit Performance-Bank 1 Sensor 3. P062B-00 - Internal Control M