Flash: Diagnostic and System Improvements
This bulletin involves selectively erasing and reprogramming the Powertrain Control
Module (PCM) with new software.
Several software improvements are available for vehicles equipped with a Cummins 6.7L
turbo Diesel.
Prevent Or Reduce Unnecessary Malfunction Indicator Lamp (MIL) Illumination
For The Following Transmission Faults. These Faults Are Currently Tripped As A
One Trip Fault And Should Have Been A Two Trip Fault:
? P0711 - TRANSMISSION TEMPERATURE SENSOR PERFORMANCE
? P0712 - TRANSMISSION TEMPERATURE SENSOR LOW
? P0713 - TRANSMISSION TEMPERATURE SENSOR HIGH
? P0714 - TRANSMISSION TEMPERATURE SENSOR INTERMITTENT
? P0740 - TCC OUT OF RANGE
? P0869 - LINE PRESSURE HIGH
? P0933 - HYDRAULIC PRESSURE SENSOR RANGE/PERFORMANCE
? P0934 - LINE PRESSURE SENSOR CIRCUIT LOW
? P0935 - LINE PRESSURE SENSOR CIRCUIT HIGH
? P1775 - SOLENOID SWITCH VALVE LATCHED IN TCC POSITION
? P1776 - SOLENOID SWITCH VALVE LATCHED IN LR POSITION
? U0100 - LOST COMMUNICATION WITH ECM/PCM
? U0002 - CAN C BUS OFF PERFORMANCE - BUS OFF
Improvements To Prevent Or Reduce Unnecessary Malfunction Indicator Lamp (MIL)
Illumination For:
? P026A - CHARGE AIR COOLER EFFICIENCY BELOW THRESHOLD
? P0544 - EXHAUST GAS TEMPERATURE SENSOR CIRCUIT - BANK 1 SENSOR 1
? P0562 - BATTERY VOLTAGE LOW
? P20EE - SCR NOx CATALYST EFFICIENCY BELOW THRESHOLD - BANK 1
? P2201 - AFTERTREATMENT NOx SENSOR CIRCUIT PERFORMANCE - BANK 1
SENSOR 1
? P2281 - AIR LEAK BETWEEN MAF AND THROTTLE BODY
? P24A5 - EGR COOLER BYPASS BANK 1 CONTROL STUCK
? P2459 - DIESEL PARTICULATE FILTER REGENERATION TOO FREQUENT
? P249E - CLOSED LOOP SCR REDUCTANT INJECTION CONTROL AT LIMIT -
FLOW TOO HIGH
Other Updates:
? With the ignition in the ?Run? position, engine not running, a small number of
customers may experience a message in the Vehicle Information Center that states
?Service Exhaust System - see dealer? erroneously.
? Add engine run time t
