Flash: Diagnostic and System Improvements
This bulletin involves selectively erasing and reprogramming the Engine Control Module (ECM) with new software.
Pickup trucks equipped with a 6.7L Cummins diesel have software improvements/enhancements available for the following DTC's:
P049D - EGR CONTROL POSITION EXCEEDED LEARNING LIMIT
P0101 - MASS AIR FLOW SENSOR "A" CIRCUIT PERFORMANCE
P0191 - FUEL RAIL PRESSURE SENSOR CIRCUIT PERFORMANCE
P2000 - NOx ABSORBER EFFICIENCY BELOW THRESHOLD (Diagnostic improvements)
P2002 - DIESEL PARTICULATE FILTER EFFICIENCY BELOW THRESHOLD (for high altitude failures)
P2195 - O2 SENSOR 1/1 OUT OF RANGE HIGH
P2196 - O2 SENSOR 1/1 OUT OF RANGE LOW
P2270 - O2 SENSOR 1/2 OUT OF RANGE HIGH
P2271 - O2 SENSOR 1/2 OUT OF RANGE LOW
P241A - O2 SENSOR 1/1 AND 1/2 OXYGEN CONCENTRATION MISMATCH
P242F - DIESEL PARTICULATE FILTER RESTRICTION - ASH ACCUMULATION
P2453 - DIESEL PARTICULATE FILTER PRESSURE SENSOR A CIRCUIT PERFORMANCE
P2609 - INTAKE AIR HEATER SYSTEM PERFORMANCEVehicles flashed to address the above codes should be driven and repair validated. If code(s) return, follow diagnostic procedures available in DealerCONNECT/TechCONNECT.Improvements other than DTC robustness or enhancements:
Improve cruise control functionality
Display correct EGR position on WiTech
Corrected CAC Outlet temperature voltage reading
Display Correct alternator voltage in WiTech
Correct for OBD II Readiness for frequent regeneration monitor
Correct water in fuel (WIF) parameter to wiTECH
ScanTool may report a code as stored, even though the fault has been cleared by completing a significant number of drive cycles without a repeat occurrence
Active codes not always displayed correctly
Engine derate with IOD removed. This will help prevent turbo damage due to oil thickening in cold climate start up on new vehicles in transit
Scan tool readiness reporting issues
EGR Valve cleaning and monitoring enhancements to help reduce occurrences of P04
