18-061-20

Flash: Powertrain Control Module (PCM) Updates 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 one or more of the following DTCs have been set:P0868 - Line Pressure Low (Module, Powertrain Control (PCM), 68RFE). P229F - Aftertreatment NOx Sensor Circuit Performance - Bank 1 Sensor 2. P207F - Reductant Quality Performance. P2509 - PCM/PCM Power Input Signal Intermittent. P0401 - EGR System Performance. P0870 - OD Hydraulic Pressure Test. P040B - Exhaust Gas Recirculation Temperature Sensor "A" Circuit Performance. P2201 - Aftertreatment NOx Sensor Circuit Performance - Bank 1 Sensor 1. P1C54 - SCR NOx Catalyst Missing. P249E - Closed Loop SCR Reductant Injection Control At Limit - Flow Too High. P0128 - Thermostat Rationality. P24C7 - Particulate Matter Sensor Temperature Circuit Performance. Customers may also comment on the following:Engine misfire in cold ambient temperatures. In addition, the following software enhancements are also available:Scan tool fan actuation test fix. Enabling diagnostics forDTC P208B- Reductant Pump 1 Control Performance. Unable to turn on the ability to set ?MAX? road speed using wiTECH scan tool. Mass Air Flow (MAF) sensor Out Of Range (OOR) low calibration. Improved 5-4 shift (reduce shift flare) after extended operation in 5th or 6th gear. Engine Manifold Pressure Misfire Monitor (EMP MFM) retune(68RFE Only). Idle based misfire retune. Abort timer for Selective Catalytic Reduction (SCR) out NOx sensor missing change to 70 seconds. Map SCR missingFault/DTC - P1C54to tampering inducement. Particulate Matter (PM) sensor false fault improvement. CC inner loop used up faults. Ultrasonic Flow Meter (UFM) test results fix. Engine run state idle unstable software fix. Ability to write Engine Serial Number (ESN) through wiTE