RAM

1805314REVB

2014-12-18 · NHTSA 10221081

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Flash: 6.7L Diagnostic And System Improvements Bulletin involves reprogramming the Powertrain Control Module (PCM) with new software. Several software improvements are available for vehicles equipped with a Cummins 6.7L turbo diesel. They are as follows:Prevent Or Reduce Malfunction Indicator Lamp (MIL) Illumination When No Defect is Present Following Diagnostic Trouble Codes (DTCs). These Faults Have Been Changed From P0201 - P0206 - Fuel Injector X Circuit Open Fault Codes. U110E - Lost Ambient Temperature Message. P049D - EGR Control Position Exceeding Learning Limit. P226C - Turgocharger Boost Control ?A? Slow Response.The Following DTC Has Been Changed From A Two Trip Fault To One Trip Fault: U1A24 - Lost Communication With Ammonia Sensor.Improvements To Prevent/ Reduce Malfunction Indicator Lamp (MIL) Illumination When No Defect Is Present For: U3017 - Control Module Timer/Clock Performance. P0087 - Fuel Rail Pressure Too Low. P2281 - Air Leak Between MAF And Throttle Body. P0544 - Exhaust Gas Temperature Sensor Circuit - Sensor 1/1. P0128 - Thermostat Rationality. In cold ambient temperatures. P214D - SCR NOx Catalyst Outlet Temperature Too High During Particulate Filter Regeneration. P24A5 - EGR Cooler Bypass Bank 1 Control Stuck. P040B - Exhaust Gas Recirculation Temperature Sensor ?A? Circuit Performance. U1421 - Implausible Ignition Key Off Time Received. P0420 - Catalyst Efficiency Below Threshold. P026B - Injection Timing Performance. P04DB - Crankcase Ventilation System Disconnected. P1C55 - NOx Sensor Intermittent - Bank 1 Sensor 1. P202E - Diesel Exhaust Fluid (DEF) Reductant Injector Performance. P20EE - SCR NOx Catalyst Efficiency Below Threshold - Bank 1. P2002 - Diesel Particulate Filter Efficiency Below Threshold. P0604 - Internal Control Module RAM. P1451 - Diesel Particulate Filter System Performance.Other Updates Included: Urea system calibration changes. Fuel Filter Minder Calibrat

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