18-052-14

Flash: 6.7L Diagnostic And System Improvements This bulletin involves selectively erasing and reprogramming the Engine Control Module/Powertrain Control Module (ECM/PCM) with new software. Several software improvements are available for vehicles equipped with a Cummins 6.7L turbo diesel.Improvements To Prevent Or Reduce Unnecessary Malfunction Indicator Lamp (Mil) Illumination For: P2281 - Air Leak Between MAF And Throttle Body. U1421 - Implausible Ignition Key Off Time Received. P026B - Injection Timing Performance.Other Software Improvements: Charging system improvements for dual alternator applications. Torque increase to 865 ft/lbs (D2 vehicles equipped with the Aisin transmission sales code DF2 only) Fuel Filter Minder calibration changes. wiTECH Fuel Pressure Override and Fuel System Run Up test improvements