KC-589

4/29/22, 10:21 AM
Article
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Engine Control Module (EMS) Software
Information - Improvement List, August 2021 US17+OBD2019 Emissions ONLY
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Internal Content
Vehicles equipped with Variable Geometry Turbocharger will be referred
as VGT. Vehicles equipped with Turbo Compound will be referred as TC.
Software Release Table (Latest information at
top)
Date Available Via PTT
VGT MSW Part # TC MSW Part #
September 2021 (Current)
23969369
23985827
November 2019
23793571
23793606
February 2019
23494739
23494752
Start of Production (January 2019)
23400825
23400874
EMS software improvements with MSW Part
Number 23969369/23985827.
Available from August 2021.
All Vehicles
VGT and TC EMS Software
The diagnostic for small fuel system leak (P009400) will not cause
Malfunction Indicator lamp (MIL) after this update.
• P009400 – Fuel System Leak Detected – Small Leak
Reduction of false faults on the following NOx Sensor faults:
• P225C00 - NOx Sensor Performance - Signal Stuck High Bank 1
Sensor 1
• P225E00 - NOx Sensor Performance - Signal Stuck High Bank 1
Sensor 2
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Improved diagnostic function routines for EGR System Checks
• Test, 2939-08-03-01 – Exhaust Gas Recirculation Function has been
replaced with 2939-08-03-03 – Exhaust Gas Recirculation System
Analysis.
• New test, 2939-08-03-03 is more capable in detecting issues with EGR
system.
• Use PTT 2.8.51 or newer and update product information to run this
operation with new engine ECU software.
Reduction of intake throttle ice formation in extreme cold weather
(less than 20 degrees Celsius Ambient) and extended idling.
Improved Idle operation to avoid stumble.
Improvement to urea reversion process. Reduction of false faults.
• P208E00 - Aftertreatment Reagent Dosing Valve Clogged
Reduction of faults
• P040100 - Engine Exhaust Gas Recirculation 1 Valve Position Flow
Insufficient Detected
New fault code has been added to detect EGR temperature pin
fretting.
• P040B00 – Exhaust Gas Recirculation Temperature Sensor “A” Circuit
Range/Performance
Reduction of faults
• P22FF00 - SCR NOx Catalyst Inlet Temperature Too Low
Reduction of false faults
• P026B00 - Injection Timing Performance
• P042000 - Catalyst System Efficiency Below Threshold
• P260900 - Intake Air Heater System Performance
Reduction of faults in cold ambient temperatures
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Live UI
• P050C00 - Cold Start Engine Coolant Temperature Performance
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13L VGT Only
EGR Valve and Intake Throttle Valve Tuning. Resolves protentional
high idle engine stumble after cold starts
13L TC Only
Reduction of false faults
• P040200 - Engine Exhaust Gas Recirculation 1 Valve Position Flow
Excessive Detected
EMS software improvements with MSW Part
Number 23938516/23940482.
Available from August 2020.
All Vehicles
Performance Bonus Broadcasting Fix
• Driver gets a road speed limit increase upon meeting idle speed and
fuel efficiency targets. Function corrected so that trophy indicator, fuel
efficiency, and sweet spot are properly displayed on the instrument
cluster. Requires cluster software to complete corrections.
EMS software improvements with MSW Part
Number 23494739/23494752.
Available from February 2019.
VGT and TC EMS Software
Preheater relay robustness improvement. Any of the fault codes
below are possible with this issue:
• P054300 - Intake Air Heater A Circuit Open
• P260513 - Intake Air Heater "B" Control
• P2CE113 - Intake Air Heater "C" Circuit/Open
• P2CE412 - Intake Air Heater "C" Circuit High
• P2CE311
- Intake Air Heater "C" Circuit Low
UI
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• P054100 - Intake Air Heater A Circuit Low
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• P26047F - Intake Air Heater "A" Circuit Range/Performance
• P26067F - Intake Air Heater B Circuit Range/Performance
• P05407E - Intake Air Heater "A" Control
• P260800 - Intake Air Heater "B" Circuit High
Reduction in the following Exhaust Aftertreatment faults.
• P042000 - Catalyst System Efficiency Below Threshold
• P042200 - Catalyst 2 Efficiency Below Threshold (Bank 1)
• P269800 - Exhaust Aftertreatment Fuel Injector "A" Performance
Smart Revert was added to prevent urea doser clogging. Reduces
occurrences of clogged urea dosage valve. Smart Revert requires
EMS and ACM software for functionality.
• P208E00 - Aftertreatment Reagent Dosing Valve Clogged
Reduces occurrences of oil temperature plausibility fault.
• P019664 - Oil Temperature
Reduces occurrences of Exhaust Aftertreatment Temperature
Sensor 4 faults.
• P246F64 - Exhaust Gas Temperature Sensor Circuit
Range/Performance Bank 1 Sensor 4
Reduce derate amount to 25% and increase rail pressure limitation
to lessen impact to customer when experiencing a fretted rail
pressure sensor.
• P019400 - Fuel Rail Pressure Sensor Circuit Intermittent/Erratic Bank 1
Smart Revert High Level Summary
; Live UI
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DEF Delayed Draining Function
A
Engine Shutdown/Key Off
1
DEF is at risk of freezing
2
Battery voltage is below 12.2v
DEF system waiting state exceeds 17 hours ( the maximum time delay
3
)
B
Initiate DEF draining process
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Tags
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p0543-00
p2605-13
p2ce1-13
p2ce3-11
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p2ce4-12
p0541-00
p2604-7f
p2606-7f
p0540-7e
p2608-00
p246f-64
p0196-64
k46475568
ems
software
p0194-00
p0420-00
p0422-00
p208e-00
p019400
p0054300
p260513
p2ce412
p2ce311
p054100
p26047f
p26067f
p05407e
p260800
p042000
p042200
p269800
p208e00
p019664
p246f64
p0094-00
p225c-00
p0401-00
p040b-64
p026b00
p050c00
p2698-00
p2ce113
p225e-00
p2609-00
volvo
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p22ff00
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