NHTSA ID Number: 11026089
Manufacturer Communication Number: TSB240147
TSB/Document Date: 2025-12-03
Summary
This Technical Service Bulletin describes the inspection and replacement steps for the water pumps in the affected Battery Electric System which may be mismatched, with one or more incompatible part numbers used, resulting in fault codes being reported. This is an update to a previously submitted communication. This is an update to a previously submitted communication.
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TSB/Document ID: TSB240147
Replacement Service Bulletin Number:
MFR Communication Date: 2025-11-10
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: FUEL/PROPULSION SYSTEM
MFR Component System:
MFR Component Subsystem:
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Technical Service Bulletin
Technical Service Bulletin: TSB240147
Released Date: 10-Nov-2025
Mismatched Water Pump Installation Causing Fault Codes: 11938, 11939, 11941, 11942, and 11943
Mismatched Water Pump Installation Causing Fault Codes: 11938, 11939, 11941, 11942,
and 11943
Warranty Statement
The information in this document has no effect on present warranty coverage or repair practices, nor does it authorize TRP or Campaign actions.
Contents
Product Affected
BES CM2450 EV105B
BES CM2450 EV107B
BES CM2450 EV110B
BES CM2450 EV111B
Issue Summary
Symptom:
One or more of the following Fault Codes are active: FC11938, FC11939, FC11941, FC11942, FC11943.
Root Cause:
All water pumps throughout the system must consistently have the same part number. The faults may appear when a mismatched water pump, with an
incompatible part number, has been installed.
Verification
Confirm the part number of the original water pump that was removed. See Table 1.
Verify if the unit has the right base system control module (SCM) calibration.
OA100021
OA100022
OA100023
OA100024
UA10001
UA10002
UA10003
UA10004
Verify if the following Fault Code(s) become active:
FC11938 after installing water pump 1
FC11939 after installing water pump 2
FC11941 after installing water pump 3
FC11942 after installing water pump 4
FC11943 after installing water pump 5
Table 1, Service Parts
Part Description
Existing Part Number
Obsolete
Superseded
New Part Number
Water Pump
112
No
No
-
Electrical Centrifugal Water
Pump
6468043
No
No
-
Resolution
Replace the water pump with the correct part number.
If needed, reference the parts catalog at parts.cummins.com for pump number verification.
If needed, update the units with the right base SCM calibration.
If fault codes are still active and all water pumps are confirmed to have the same part number, continue through the published Troubleshooting Tree.
Document History
Date
Details
2024-7-12
Module Created
2025-11-6
Added model BES CM2450 EV111B
Last Modified: 10-Nov-2025
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