Flash: 6.7L Diagnostic And System Improvements
This bulletin involves selectively erasing and reprogramming the Engine Control Module
(ECM) with new software.
Several software improvements are available for vehicles equipped with a Cummins 6.7L
turbo Diesel.
NOTE: There will be a choice between 2 calibrations. One for vehicles that utilize an
ammonia sensor and one for vehicles that have had the ammonia sensor
removed. Be sure to select the correct software based on vehicle
configuration.
Prevent or reduce Malfunction Indicator Lamp (MIL) illumination when no defect is
present for the following Diagnostic Trouble Codes (DTCs). These faults have been
changed from a one trip fault to a two trip fault:
· P0201 - P0206 - Fuel Injector X Circuit/Open Fault Codes.
· P049D - Exhaust Gas Recirculation (EGR) Control Position Exceeding Learning
Limit.
Improvements to prevent or reduce Malfunction Indicator Lamp (MIL) illumination
when no defect is present for:
· **P229E - NOx Sensor Circuit - Bank 1 Sensor 2 (For non-ammonia delete systems
only).
· P229F - Aftertreatment NOx Sensor Circuit Performance - Bank 1 Sensor 2 (For
non-ammonia delete systems only).
· P22A7 - NOx Sensor Heater Circuit Performance - Bank 1 Sensor 2 (For
non-ammonia delete systems only).
· U059F - Invalid Data Received From NOx Sensor "B" (For non-ammonia delete
systems only).
· P2459 - Diesel Particulate Filter Regeneration Too Frequent.
· P218F - Reductant No Flow Detected.
· P242F - Diesel Particulate Filter Restriction - Ash Accumulation.**
· P1C55 - NOx Sensor Intermittent - Bank 1 Sensor 1 (For ammonia delete systems
only).
· P205E - (Diesel Exhaust Fluid) Reductant Tank Temperature Sensor Circuit
Intermittent (setting when the block heater is plugged in).
· P20E8 - (Diesel Exhaust Fluid) Reductant Pressure Too Low.
· U110E - Lost Ambient Temperature Message.
· U3017 - Control Module Timer/Clock Performance.
