Technical Service Bulletin 1813122 — 2018 RAM 5500

Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the 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: P064F - Unauthorized Software/Calibration Detected. P229F - Aftertreatment NOx Sensor Circuit Performance - Bank 1 Sensor 2. P207F - Reductant Quality Performance. P249E - Closed Loop Scr Reductant Injection Control At Limit - Flow Too High. P2509 - PCM/PCM Power Input Signal Intermittent. P0128 - Thermostat Rationality. P2201 - Aftertreatment NOx Sensor Circuit Performance - Bank 1 Sensor 1. In addition, the following software enhancements are also available:Scan Tool Fan Actuation Test fix. Enabling DTC P208B - Reductant Pump 1 Control Performance. Mass Air Flow (MAF) Sensor Out Of Range (OOR) low calibration. Idle based misfire retune. Abort timer for Selective Catalytic Reduction (SCR) Out NOx Sensor missing change to 70 seconds. Map SCR missing DTC/Fault (P1C54) to 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 wiTECH. Add Diesel Exhaust Fluid (DEF)/Reagent type as a readable value in wiTECH. Fan actuation test. SCR missing tuning capability improvement. Smart tampering improvement.